126 lines
4.9 KiB
LLVM
126 lines
4.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "E-p:64:64:64-p1:32:32:32-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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; Instcombine should be able to prove vector alignment in the
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; presence of a few mild address computation tricks.
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define void @test0(i8* %b, i64 %n, i64 %u, i64 %y) nounwind {
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; CHECK-LABEL: @test0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C:%.*]] = ptrtoint i8* [[B:%.*]] to i64
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; CHECK-NEXT: [[D:%.*]] = and i64 [[C]], -16
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; CHECK-NEXT: [[E:%.*]] = inttoptr i64 [[D]] to double*
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; CHECK-NEXT: [[V:%.*]] = shl i64 [[U:%.*]], 1
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; CHECK-NEXT: [[Z:%.*]] = and i64 [[Y:%.*]], -2
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; CHECK-NEXT: [[T1421:%.*]] = icmp eq i64 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[T1421]], label [[RETURN:%.*]], label [[BB:%.*]]
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; CHECK: bb:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[BB]] ], [ 20, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[J:%.*]] = mul i64 [[I]], [[V]]
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; CHECK-NEXT: [[H:%.*]] = add i64 [[J]], [[Z]]
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; CHECK-NEXT: [[T8:%.*]] = getelementptr double, double* [[E]], i64 [[H]]
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; CHECK-NEXT: [[P:%.*]] = bitcast double* [[T8]] to <2 x double>*
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; CHECK-NEXT: store <2 x double> zeroinitializer, <2 x double>* [[P]], align 16
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; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[I]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVAR_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[RETURN]], label [[BB]]
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; CHECK: return:
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; CHECK-NEXT: ret void
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;
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entry:
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%c = ptrtoint i8* %b to i64
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%d = and i64 %c, -16
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%e = inttoptr i64 %d to double*
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%v = mul i64 %u, 2
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%z = and i64 %y, -2
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%t1421 = icmp eq i64 %n, 0
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br i1 %t1421, label %return, label %bb
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bb:
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%i = phi i64 [ %indvar.next, %bb ], [ 20, %entry ]
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%j = mul i64 %i, %v
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%h = add i64 %j, %z
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%t8 = getelementptr double, double* %e, i64 %h
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%p = bitcast double* %t8 to <2 x double>*
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store <2 x double><double 0.0, double 0.0>, <2 x double>* %p, align 8
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%indvar.next = add i64 %i, 1
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%exitcond = icmp eq i64 %indvar.next, %n
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br i1 %exitcond, label %return, label %bb
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return:
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ret void
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}
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; When we see a unaligned load from an insufficiently aligned global or
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; alloca, increase the alignment of the load, turning it into an aligned load.
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@GLOBAL = internal global [4 x i32] zeroinitializer
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define <16 x i8> @test1(<2 x i64> %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, <16 x i8>* bitcast ([4 x i32]* @GLOBAL to <16 x i8>*), align 16
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; CHECK-NEXT: ret <16 x i8> [[TMP]]
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;
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entry:
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%tmp = load <16 x i8>, <16 x i8>* bitcast ([4 x i32]* @GLOBAL to <16 x i8>*), align 1
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ret <16 x i8> %tmp
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}
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@GLOBAL_as1 = internal addrspace(1) global [4 x i32] zeroinitializer
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define <16 x i8> @test1_as1(<2 x i64> %x) {
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; CHECK-LABEL: @test1_as1(
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; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, <16 x i8> addrspace(1)* bitcast ([4 x i32] addrspace(1)* @GLOBAL_as1 to <16 x i8> addrspace(1)*), align 16
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; CHECK-NEXT: ret <16 x i8> [[TMP]]
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;
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%tmp = load <16 x i8>, <16 x i8> addrspace(1)* bitcast ([4 x i32] addrspace(1)* @GLOBAL_as1 to <16 x i8> addrspace(1)*), align 1
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ret <16 x i8> %tmp
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}
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@GLOBAL_as1_gep = internal addrspace(1) global [8 x i32] zeroinitializer
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define <16 x i8> @test1_as1_gep(<2 x i64> %x) {
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; CHECK-LABEL: @test1_as1_gep(
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; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, <16 x i8> addrspace(1)* bitcast (i32 addrspace(1)* getelementptr inbounds ([8 x i32], [8 x i32] addrspace(1)* @GLOBAL_as1_gep, i32 0, i32 4) to <16 x i8> addrspace(1)*), align 16
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; CHECK-NEXT: ret <16 x i8> [[TMP]]
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;
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%tmp = load <16 x i8>, <16 x i8> addrspace(1)* bitcast (i32 addrspace(1)* getelementptr ([8 x i32], [8 x i32] addrspace(1)* @GLOBAL_as1_gep, i16 0, i16 4) to <16 x i8> addrspace(1)*), align 1
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ret <16 x i8> %tmp
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}
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; When a load or store lacks an explicit alignment, add one.
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define double @test2(double* %p, double %n) nounwind {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[T:%.*]] = load double, double* [[P:%.*]], align 8
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; CHECK-NEXT: store double [[N:%.*]], double* [[P]], align 8
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; CHECK-NEXT: ret double [[T]]
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;
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%t = load double, double* %p
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store double %n, double* %p
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ret double %t
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}
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
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declare void @use(i8*)
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%struct.s = type { i32, i32, i32, i32 }
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define void @test3(%struct.s* sret(%struct.s) %a4) {
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; Check that the alignment is bumped up the alignment of the sret type.
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[A4_CAST:%.*]] = bitcast %struct.s* [[A4:%.*]] to i8*
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; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(16) [[A4_CAST]], i8 0, i64 16, i1 false)
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; CHECK-NEXT: call void @use(i8* [[A4_CAST]])
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; CHECK-NEXT: ret void
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;
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%a4.cast = bitcast %struct.s* %a4 to i8*
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call void @llvm.memset.p0i8.i64(i8* %a4.cast, i8 0, i64 16, i1 false)
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call void @use(i8* %a4.cast)
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ret void
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}
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