forked from OSchip/llvm-project
647 lines
18 KiB
LLVM
647 lines
18 KiB
LLVM
; RUN: opt -gvn-hoist -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@GlobalVar = internal global float 1.000000e+00
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; Check that all scalar expressions are hoisted.
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;
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; CHECK-LABEL: @scalarsHoisting
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: fsub
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; CHECK: fmul
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; CHECK-NOT: fmul
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; CHECK-NOT: fsub
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define float @scalarsHoisting(float %d, float %min, float %max, float %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%sub = fsub float %min, %a
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%mul = fmul float %sub, %div
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%sub1 = fsub float %max, %a
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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%sub3 = fsub float %max, %a
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%mul4 = fmul float %sub3, %div
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%sub5 = fsub float %min, %a
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that all loads and scalars depending on the loads are hoisted.
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; Check that getelementptr computation gets hoisted before the load.
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;
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; CHECK-LABEL: @readsAndScalarsHoisting
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; CHECK: load
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; CHECK: load
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: fsub
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; CHECK: fmul
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; CHECK-NOT: load
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; CHECK-NOT: fmul
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; CHECK-NOT: fsub
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define float @readsAndScalarsHoisting(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%A = getelementptr float, float* %min, i32 1
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%0 = load float, float* %A, align 4
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%1 = load float, float* %a, align 4
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
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%sub3 = fsub float %3, %4
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%mul4 = fmul float %sub3, %div
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%B = getelementptr float, float* %min, i32 1
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%5 = load float, float* %B, align 4
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%sub5 = fsub float %5, %4
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that we do not hoist loads after a store: the first two loads will be
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; hoisted, and then the third load will not be hoisted.
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;
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; CHECK-LABEL: @readsAndWrites
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; CHECK: load
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: store
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK-NOT: load
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; CHECK-NOT: fmul
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; CHECK-NOT: fsub
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define float @readsAndWrites(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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store float %0, float* @GlobalVar
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
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%sub3 = fsub float %3, %4
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%mul4 = fmul float %sub3, %div
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%5 = load float, float* %min, align 4
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%sub5 = fsub float %5, %4
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that we do hoist loads when the store is above the insertion point.
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;
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; CHECK-LABEL: @readsAndWriteAboveInsertPt
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; CHECK: load
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; CHECK: load
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: fsub
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; CHECK: fmul
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; CHECK-NOT: load
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; CHECK-NOT: fmul
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; CHECK-NOT: fsub
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define float @readsAndWriteAboveInsertPt(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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store float 0.000000e+00, float* @GlobalVar
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
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%sub3 = fsub float %3, %4
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%mul4 = fmul float %sub3, %div
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%5 = load float, float* %min, align 4
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%sub5 = fsub float %5, %4
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that dependent expressions are hoisted.
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; CHECK-LABEL: @dependentScalarsHoisting
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; CHECK: fsub
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; CHECK: fadd
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; CHECK: fdiv
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; CHECK: fmul
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; CHECK-NOT: fsub
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; CHECK-NOT: fadd
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; CHECK-NOT: fdiv
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; CHECK-NOT: fmul
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define float @dependentScalarsHoisting(float %a, float %b, i1 %c) {
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entry:
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br i1 %c, label %if.then, label %if.else
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if.then:
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%d = fsub float %b, %a
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%e = fadd float %d, %a
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%f = fdiv float %e, %a
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%g = fmul float %f, %a
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br label %if.end
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if.else:
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%h = fsub float %b, %a
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%i = fadd float %h, %a
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%j = fdiv float %i, %a
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%k = fmul float %j, %a
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br label %if.end
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if.end:
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%r = phi float [ %g, %if.then ], [ %k, %if.else ]
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ret float %r
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}
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; Check that all independent expressions are hoisted.
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; CHECK-LABEL: @independentScalarsHoisting
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; CHECK: fsub
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; CHECK: fdiv
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; CHECK: fmul
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; CHECK: fadd
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; CHECK-NOT: fsub
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; CHECK-NOT: fdiv
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; CHECK-NOT: fmul
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define float @independentScalarsHoisting(float %a, float %b, i1 %c) {
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entry:
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br i1 %c, label %if.then, label %if.else
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if.then:
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%d = fadd float %b, %a
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%e = fsub float %b, %a
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%f = fdiv float %b, %a
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%g = fmul float %b, %a
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br label %if.end
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if.else:
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%i = fadd float %b, %a
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%h = fsub float %b, %a
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%j = fdiv float %b, %a
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%k = fmul float %b, %a
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br label %if.end
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if.end:
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%p = phi float [ %d, %if.then ], [ %i, %if.else ]
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%q = phi float [ %e, %if.then ], [ %h, %if.else ]
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%r = phi float [ %f, %if.then ], [ %j, %if.else ]
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%s = phi float [ %g, %if.then ], [ %k, %if.else ]
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%t = fadd float %p, %q
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%u = fadd float %r, %s
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%v = fadd float %t, %u
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ret float %v
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}
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; Check that we hoist load and scalar expressions in triangles.
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; CHECK-LABEL: @triangleHoisting
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; CHECK: load
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; CHECK: load
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; CHECK: load
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; CHECK: fsub
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; CHECK: fmul
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; CHECK: fsub
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; CHECK: fmul
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; CHECK-NOT: load
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; CHECK-NOT: fmul
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; CHECK-NOT: fsub
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define float @triangleHoisting(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.end: ; preds = %entry
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%p1 = phi float [ %mul2, %if.then ], [ 0.000000e+00, %entry ]
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%p2 = phi float [ %mul, %if.then ], [ 0.000000e+00, %entry ]
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
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%sub3 = fsub float %3, %4
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%mul4 = fmul float %sub3, %div
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%5 = load float, float* %min, align 4
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%sub5 = fsub float %5, %4
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%mul6 = fmul float %sub5, %div
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%x = fadd float %p1, %mul6
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%y = fadd float %p2, %mul4
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%z = fadd float %x, %y
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ret float %z
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}
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; Check that we do not hoist loads past stores within a same basic block.
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; CHECK-LABEL: @noHoistInSingleBBWithStore
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; CHECK: load
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; CHECK: store
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; CHECK: load
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; CHECK: store
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define i32 @noHoistInSingleBBWithStore() {
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entry:
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%D = alloca i32, align 4
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%0 = bitcast i32* %D to i8*
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%bf = load i8, i8* %0, align 4
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%bf.clear = and i8 %bf, -3
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store i8 %bf.clear, i8* %0, align 4
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%bf1 = load i8, i8* %0, align 4
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%bf.clear1 = and i8 %bf1, 1
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store i8 %bf.clear1, i8* %0, align 4
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ret i32 0
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}
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; Check that we do not hoist loads past calls within a same basic block.
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; CHECK-LABEL: @noHoistInSingleBBWithCall
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; CHECK: load
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; CHECK: call
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; CHECK: load
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declare void @foo()
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define i32 @noHoistInSingleBBWithCall() {
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entry:
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%D = alloca i32, align 4
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%0 = bitcast i32* %D to i8*
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%bf = load i8, i8* %0, align 4
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%bf.clear = and i8 %bf, -3
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call void @foo()
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%bf1 = load i8, i8* %0, align 4
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%bf.clear1 = and i8 %bf1, 1
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ret i32 0
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}
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; Check that we do not hoist loads past stores in any branch of a diamond.
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; CHECK-LABEL: @noHoistInDiamondWithOneStore1
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; CHECK: fdiv
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; CHECK: fcmp
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; CHECK: br
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define float @noHoistInDiamondWithOneStore1(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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store float 0.000000e+00, float* @GlobalVar
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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; There are no side effects on the if.else branch.
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
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%sub3 = fsub float %3, %4
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%mul4 = fmul float %sub3, %div
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%5 = load float, float* %min, align 4
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%sub5 = fsub float %5, %4
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
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%6 = load float, float* %max, align 4
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%7 = load float, float* %a, align 4
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%sub6 = fsub float %6, %7
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%mul7 = fmul float %sub6, %div
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%8 = load float, float* %min, align 4
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%sub8 = fsub float %8, %7
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%mul9 = fmul float %sub8, %div
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that we do not hoist loads past stores from half diamond.
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; CHECK-LABEL: @noHoistInHalfDiamondPastStore
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; CHECK: load
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; CHECK-NEXT: load
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; CHECK-NEXT: store
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; CHECK-NEXT: br
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; CHECK: load
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; CHECK: load
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; CHECK: load
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; CHECK: br
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define float @noHoistInHalfDiamondPastStore(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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; Loads should not be hoisted above this store.
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store float 0.000000e+00, float* @GlobalVar
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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; There are no side effects on the if.then branch.
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%2 = load float, float* %max, align 4
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%3 = load float, float* %a, align 4
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%sub3 = fsub float %2, %3
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%mul4 = fmul float %sub3, %div
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%4 = load float, float* %min, align 4
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%sub5 = fsub float %4, %3
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%mul6 = fmul float %sub5, %div
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br label %if.end
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if.end:
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%tmax.0 = phi float [ %mul4, %if.then ], [ %0, %entry ]
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%tmin.0 = phi float [ %mul6, %if.then ], [ %1, %entry ]
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%add = fadd float %tmax.0, %tmin.0
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ret float %add
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}
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; Check that we do not hoist loads past a store in any branch of a diamond.
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; CHECK-LABEL: @noHoistInDiamondWithOneStore2
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; CHECK: fdiv
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; CHECK: fcmp
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; CHECK: br
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define float @noHoistInDiamondWithOneStore2(float %d, float* %min, float* %max, float* %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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; There are no side effects on the if.then branch.
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%0 = load float, float* %min, align 4
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%1 = load float, float* %a, align 4
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%sub = fsub float %0, %1
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%mul = fmul float %sub, %div
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%2 = load float, float* %max, align 4
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%sub1 = fsub float %2, %1
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%mul2 = fmul float %sub1, %div
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br label %if.end
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if.else: ; preds = %entry
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store float 0.000000e+00, float* @GlobalVar
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%3 = load float, float* %max, align 4
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%4 = load float, float* %a, align 4
|
|
%sub3 = fsub float %3, %4
|
|
%mul4 = fmul float %sub3, %div
|
|
%5 = load float, float* %min, align 4
|
|
%sub5 = fsub float %5, %4
|
|
%mul6 = fmul float %sub5, %div
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.else, %if.then
|
|
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
|
|
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
|
|
|
|
%6 = load float, float* %max, align 4
|
|
%7 = load float, float* %a, align 4
|
|
%sub6 = fsub float %6, %7
|
|
%mul7 = fmul float %sub6, %div
|
|
%8 = load float, float* %min, align 4
|
|
%sub8 = fsub float %8, %7
|
|
%mul9 = fmul float %sub8, %div
|
|
|
|
%add = fadd float %tmax.0, %tmin.0
|
|
ret float %add
|
|
}
|
|
|
|
; Check that we do not hoist loads outside a loop containing stores.
|
|
; CHECK-LABEL: @noHoistInLoopsWithStores
|
|
; CHECK: fdiv
|
|
; CHECK: fcmp
|
|
; CHECK: br
|
|
define float @noHoistInLoopsWithStores(float %d, float* %min, float* %max, float* %a) {
|
|
entry:
|
|
%div = fdiv float 1.000000e+00, %d
|
|
%cmp = fcmp oge float %div, 0.000000e+00
|
|
br i1 %cmp, label %do.body, label %if.else
|
|
|
|
do.body:
|
|
%0 = load float, float* %min, align 4
|
|
%1 = load float, float* %a, align 4
|
|
|
|
; It is unsafe to hoist the loads outside the loop because of the store.
|
|
store float 0.000000e+00, float* @GlobalVar
|
|
|
|
%sub = fsub float %0, %1
|
|
%mul = fmul float %sub, %div
|
|
%2 = load float, float* %max, align 4
|
|
%sub1 = fsub float %2, %1
|
|
%mul2 = fmul float %sub1, %div
|
|
br label %while.cond
|
|
|
|
while.cond:
|
|
%cmp1 = fcmp oge float %mul2, 0.000000e+00
|
|
br i1 %cmp1, label %if.end, label %do.body
|
|
|
|
if.else:
|
|
%3 = load float, float* %max, align 4
|
|
%4 = load float, float* %a, align 4
|
|
%sub3 = fsub float %3, %4
|
|
%mul4 = fmul float %sub3, %div
|
|
%5 = load float, float* %min, align 4
|
|
%sub5 = fsub float %5, %4
|
|
%mul6 = fmul float %sub5, %div
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%tmax.0 = phi float [ %mul2, %while.cond ], [ %mul6, %if.else ]
|
|
%tmin.0 = phi float [ %mul, %while.cond ], [ %mul4, %if.else ]
|
|
|
|
%add = fadd float %tmax.0, %tmin.0
|
|
ret float %add
|
|
}
|
|
|
|
; Check that we hoist stores: all the instructions from the then branch
|
|
; should be hoisted.
|
|
; CHECK-LABEL: @hoistStores
|
|
; CHECK: zext
|
|
; CHECK-NEXT: trunc
|
|
; CHECK-NEXT: getelementptr
|
|
; CHECK-NEXT: load
|
|
; CHECK-NEXT: getelementptr
|
|
; CHECK-NEXT: getelementptr
|
|
; CHECK-NEXT: store
|
|
; CHECK-NEXT: load
|
|
; CHECK-NEXT: load
|
|
; CHECK-NEXT: zext
|
|
; CHECK-NEXT: add
|
|
; CHECK-NEXT: store
|
|
; CHECK-NEXT: br
|
|
; CHECK: if.then
|
|
; CHECK: br
|
|
|
|
%struct.foo = type { i16* }
|
|
|
|
define void @hoistStores(%struct.foo* %s, i32* %coord, i1 zeroext %delta) {
|
|
entry:
|
|
%frombool = zext i1 %delta to i8
|
|
%tobool = trunc i8 %frombool to i1
|
|
br i1 %tobool, label %if.then, label %if.else
|
|
|
|
if.then: ; preds = %entry
|
|
%p = getelementptr inbounds %struct.foo, %struct.foo* %s, i32 0, i32 0
|
|
%0 = load i16*, i16** %p, align 8
|
|
%incdec.ptr = getelementptr inbounds i16, i16* %0, i32 1
|
|
store i16* %incdec.ptr, i16** %p, align 8
|
|
%1 = load i16, i16* %0, align 2
|
|
%conv = zext i16 %1 to i32
|
|
%2 = load i32, i32* %coord, align 4
|
|
%add = add i32 %2, %conv
|
|
store i32 %add, i32* %coord, align 4
|
|
br label %if.end
|
|
|
|
if.else: ; preds = %entry
|
|
%p1 = getelementptr inbounds %struct.foo, %struct.foo* %s, i32 0, i32 0
|
|
%3 = load i16*, i16** %p1, align 8
|
|
%incdec.ptr2 = getelementptr inbounds i16, i16* %3, i32 1
|
|
store i16* %incdec.ptr2, i16** %p1, align 8
|
|
%4 = load i16, i16* %3, align 2
|
|
%conv3 = zext i16 %4 to i32
|
|
%5 = load i32, i32* %coord, align 4
|
|
%add4 = add i32 %5, %conv3
|
|
store i32 %add4, i32* %coord, align 4
|
|
%6 = load i16*, i16** %p1, align 8
|
|
%incdec.ptr6 = getelementptr inbounds i16, i16* %6, i32 1
|
|
store i16* %incdec.ptr6, i16** %p1, align 8
|
|
%7 = load i16, i16* %6, align 2
|
|
%conv7 = zext i16 %7 to i32
|
|
%shl = shl i32 %conv7, 8
|
|
%8 = load i32, i32* %coord, align 4
|
|
%add8 = add i32 %8, %shl
|
|
store i32 %add8, i32* %coord, align 4
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.else, %if.then
|
|
ret void
|
|
}
|
|
|
|
define i32 @mergeAlignments(i1 %b, i32* %y) {
|
|
entry:
|
|
br i1 %b, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry
|
|
%l1 = load i32, i32* %y, align 4
|
|
br label %return
|
|
|
|
if.end: ; preds = %entry
|
|
%l2 = load i32, i32* %y, align 1
|
|
br label %return
|
|
|
|
return: ; preds = %if.end, %if.then
|
|
%retval.0 = phi i32 [ %l1, %if.then ], [ %l2, %if.end ]
|
|
ret i32 %retval.0
|
|
}
|
|
; CHECK-LABEL: define i32 @mergeAlignments(
|
|
; CHECK: %[[load:.*]] = load i32, i32* %y, align 1
|
|
; CHECK: %[[phi:.*]] = phi i32 [ %[[load]], %{{.*}} ], [ %[[load]], %{{.*}} ]
|
|
; CHECK: i32 %[[phi]]
|
|
|
|
|
|
declare i8 @pr30991_f() nounwind readonly
|
|
declare void @pr30991_f1(i8)
|
|
define i8 @pr30991(i8* %sp, i8* %word, i1 %b1, i1 %b2) {
|
|
entry:
|
|
br i1 %b1, label %a, label %b
|
|
|
|
a:
|
|
%r0 = load i8, i8* %word, align 1
|
|
%incdec.ptr = getelementptr i8, i8* %sp, i32 1
|
|
%rr0 = call i8 @pr30991_f() nounwind readonly
|
|
call void @pr30991_f1(i8 %r0)
|
|
ret i8 %rr0
|
|
|
|
b:
|
|
br i1 %b2, label %c, label %x
|
|
|
|
c:
|
|
%r1 = load i8, i8* %word, align 1
|
|
%incdec.ptr115 = getelementptr i8, i8* %sp, i32 1
|
|
%rr1 = call i8 @pr30991_f() nounwind readonly
|
|
call void @pr30991_f1(i8 %r1)
|
|
ret i8 %rr1
|
|
|
|
x:
|
|
%r2 = load i8, i8* %word, align 1
|
|
ret i8 %r2
|
|
}
|
|
|
|
; CHECK-LABEL: define i8 @pr30991
|
|
; CHECK: %r0 = load i8, i8* %word, align 1
|
|
; CHECK-NEXT: br i1 %b1, label %a, label %b
|