97 lines
2.5 KiB
LLVM
97 lines
2.5 KiB
LLVM
; RUN: opt -passes=sroa -S < %s | FileCheck %s
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; This test checks that SROA does not introduce ptrtoint and inttoptr
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; casts from and to non-integral pointers. The "ni:4" bit in the
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; datalayout states that pointers of address space 4 are to be
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; considered "non-integral".
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:4"
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target triple = "x86_64-unknown-linux-gnu"
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define void @f0(i1 %alwaysFalse, i64 %val) {
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; CHECK-LABEL: @f0(
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; CHECK-NOT: inttoptr
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; CHECK-NOT: ptrtoint
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entry:
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%loc = alloca i64
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store i64 %val, ptr %loc
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br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
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neverTaken:
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%ptr = load ptr addrspace(4), ptr %loc
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store i8 5, ptr addrspace(4) %ptr
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ret void
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alwaysTaken:
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ret void
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}
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define i64 @f1(i1 %alwaysFalse, ptr addrspace(4) %val) {
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; CHECK-LABEL: @f1(
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; CHECK-NOT: inttoptr
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; CHECK-NOT: ptrtoint
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entry:
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%loc = alloca ptr addrspace(4)
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store ptr addrspace(4) %val, ptr %loc
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br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
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neverTaken:
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%int = load i64, ptr %loc
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ret i64 %int
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alwaysTaken:
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ret i64 42
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}
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define ptr addrspace(4) @memset(i1 %alwaysFalse) {
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; CHECK-LABEL: @memset(
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; CHECK-NOT: inttoptr
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; CHECK-NOT: ptrtoint
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entry:
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%x = alloca ptr addrspace(4)
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call void @llvm.memset.p0.i64(ptr align 8 %x, i8 5, i64 16, i1 false)
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br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
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neverTaken:
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%x.field.ld.0 = load ptr addrspace(4), ptr %x
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ret ptr addrspace(4) %x.field.ld.0
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alwaysTaken:
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ret ptr addrspace(4) null
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}
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;; TODO: This one demonstrates a missed oppurtunity. The only known bit
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;; pattern for a non-integral bit pattern is that null is zero. As such
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;; we could do SROA and replace the memset w/a null store. This will
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;; usually be gotten by instcombine.
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define ptr addrspace(4) @memset_null(i1 %alwaysFalse) {
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; CHECK-LABEL: @memset_null(
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; CHECK-NOT: inttoptr
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; CHECK-NOT: ptrtoint
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entry:
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%x = alloca ptr addrspace(4)
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call void @llvm.memset.p0.i64(ptr align 8 %x, i8 0, i64 16, i1 false)
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br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
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neverTaken:
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%x.field.ld.0 = load ptr addrspace(4), ptr %x
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ret ptr addrspace(4) %x.field.ld.0
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alwaysTaken:
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ret ptr addrspace(4) null
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}
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%union.anon = type { ptr }
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; CHECK-LABEL: @f2(
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; CHECK-NOT: ptr2int
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; CHECK-NOT: int2ptr
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define ptr@f2(ptr addrspace(4) %p) {
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%1 = alloca %union.anon, align 8
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store ptr addrspace(4) %p, ptr %1, align 8
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%2 = load ptr, ptr %1, align 8
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ret ptr %2
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}
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declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
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