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d7f42eeb67
https://bugs.llvm.org/show_bug.cgi?id=43501 We can't declare a GEP 'inbounds' in general. But we may salvage that information if we have known dereferenceable bytes on the source pointer. Differential Revision: https://reviews.llvm.org/D68244 llvm-svn: 373847
187 lines
7.8 KiB
LLVM
187 lines
7.8 KiB
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-p1:32:32:32-p2:16:16:16-n8:16:32:64"
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i1) nounwind
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declare void @llvm.memcpy.p0i8.p1i8.i32(i8*, i8 addrspace(1)*, i32, i1) nounwind
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declare void @llvm.memcpy.p0i8.p2i8.i32(i8*, i8 addrspace(2)*, i32, i1) nounwind
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define i32* @combine_redundant_addrspacecast(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_redundant_addrspacecast(
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; CHECK: addrspacecast i32 addrspace(1)* %x to i32*
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; CHECK-NEXT: ret
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%y = addrspacecast i32 addrspace(1)* %x to i32 addrspace(3)*
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%z = addrspacecast i32 addrspace(3)* %y to i32*
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ret i32* %z
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}
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define <4 x i32*> @combine_redundant_addrspacecast_vector(<4 x i32 addrspace(1)*> %x) nounwind {
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; CHECK-LABEL: @combine_redundant_addrspacecast_vector(
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; CHECK: addrspacecast <4 x i32 addrspace(1)*> %x to <4 x i32*>
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; CHECK-NEXT: ret
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%y = addrspacecast <4 x i32 addrspace(1)*> %x to <4 x i32 addrspace(3)*>
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%z = addrspacecast <4 x i32 addrspace(3)*> %y to <4 x i32*>
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ret <4 x i32*> %z
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}
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define float* @combine_redundant_addrspacecast_types(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_redundant_addrspacecast_types(
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; CHECK-NEXT: bitcast i32 addrspace(1)* %x to float addrspace(1)*
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; CHECK-NEXT: addrspacecast float addrspace(1)* %1 to float*
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; CHECK-NEXT: ret
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%y = addrspacecast i32 addrspace(1)* %x to i32 addrspace(3)*
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%z = addrspacecast i32 addrspace(3)* %y to float*
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ret float* %z
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}
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define <4 x float*> @combine_redundant_addrspacecast_types_vector(<4 x i32 addrspace(1)*> %x) nounwind {
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; CHECK-LABEL: @combine_redundant_addrspacecast_types_vector(
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; CHECK-NEXT: bitcast <4 x i32 addrspace(1)*> %x to <4 x float addrspace(1)*>
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; CHECK-NEXT: addrspacecast <4 x float addrspace(1)*> %1 to <4 x float*>
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; CHECK-NEXT: ret
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%y = addrspacecast <4 x i32 addrspace(1)*> %x to <4 x i32 addrspace(3)*>
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%z = addrspacecast <4 x i32 addrspace(3)*> %y to <4 x float*>
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ret <4 x float*> %z
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}
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define float addrspace(2)* @combine_addrspacecast_bitcast_1(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_addrspacecast_bitcast_1(
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; CHECK-NEXT: bitcast i32 addrspace(1)* %x to float addrspace(1)*
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; CHECK-NEXT: addrspacecast float addrspace(1)* %1 to float addrspace(2)*
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; CHECK-NEXT: ret
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%y = addrspacecast i32 addrspace(1)* %x to i32 addrspace(2)*
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%z = bitcast i32 addrspace(2)* %y to float addrspace(2)*
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ret float addrspace(2)* %z
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}
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define i32 addrspace(2)* @combine_addrspacecast_bitcast_2(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_addrspacecast_bitcast_2(
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; CHECK: addrspacecast i32 addrspace(1)* %x to i32 addrspace(2)*
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; CHECK-NEXT: ret
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%y = addrspacecast i32 addrspace(1)* %x to float addrspace(2)*
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%z = bitcast float addrspace(2)* %y to i32 addrspace(2)*
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ret i32 addrspace(2)* %z
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}
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define i32 addrspace(2)* @combine_bitcast_addrspacecast_1(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_bitcast_addrspacecast_1(
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; CHECK: addrspacecast i32 addrspace(1)* %x to i32 addrspace(2)*
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; CHECK-NEXT: ret
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%y = bitcast i32 addrspace(1)* %x to i8 addrspace(1)*
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%z = addrspacecast i8 addrspace(1)* %y to i32 addrspace(2)*
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ret i32 addrspace(2)* %z
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}
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define float addrspace(2)* @combine_bitcast_addrspacecast_2(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_bitcast_addrspacecast_2(
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; CHECK: bitcast i32 addrspace(1)* %x to float addrspace(1)*
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; CHECK: addrspacecast float addrspace(1)* %1 to float addrspace(2)*
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; CHECK-NEXT: ret
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%y = bitcast i32 addrspace(1)* %x to i8 addrspace(1)*
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%z = addrspacecast i8 addrspace(1)* %y to float addrspace(2)*
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ret float addrspace(2)* %z
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}
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define float addrspace(2)* @combine_addrspacecast_types(i32 addrspace(1)* %x) nounwind {
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; CHECK-LABEL: @combine_addrspacecast_types(
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; CHECK-NEXT: bitcast i32 addrspace(1)* %x to float addrspace(1)*
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; CHECK-NEXT: addrspacecast float addrspace(1)* %1 to float addrspace(2)*
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; CHECK-NEXT: ret
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%y = addrspacecast i32 addrspace(1)* %x to float addrspace(2)*
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ret float addrspace(2)* %y
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}
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define <4 x float addrspace(2)*> @combine_addrspacecast_types_vector(<4 x i32 addrspace(1)*> %x) nounwind {
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; CHECK-LABEL: @combine_addrspacecast_types_vector(
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; CHECK-NEXT: bitcast <4 x i32 addrspace(1)*> %x to <4 x float addrspace(1)*>
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; CHECK-NEXT: addrspacecast <4 x float addrspace(1)*> %1 to <4 x float addrspace(2)*>
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; CHECK-NEXT: ret
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%y = addrspacecast <4 x i32 addrspace(1)*> %x to <4 x float addrspace(2)*>
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ret <4 x float addrspace(2)*> %y
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}
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define i32 @canonicalize_addrspacecast([16 x i32] addrspace(1)* %arr) {
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; CHECK-LABEL: @canonicalize_addrspacecast(
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; CHECK-NEXT: getelementptr [16 x i32], [16 x i32] addrspace(1)* %arr, i32 0, i32 0
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; CHECK-NEXT: addrspacecast i32 addrspace(1)* %{{[a-zA-Z0-9]+}} to i32*
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; CHECK-NEXT: load i32, i32*
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; CHECK-NEXT: ret i32
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%p = addrspacecast [16 x i32] addrspace(1)* %arr to i32*
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%v = load i32, i32* %p
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ret i32 %v
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}
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@const_array = addrspace(2) constant [60 x i8] [i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
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i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
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i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
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i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
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i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22 ]
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declare void @foo(i8*) nounwind
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; A copy from a constant addrspacecast'ed global
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; CHECK-LABEL: @memcpy_addrspacecast(
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; CHECK-NOT: call void @llvm.memcpy
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define i32 @memcpy_addrspacecast() nounwind {
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entry:
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%alloca = alloca i8, i32 48
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call void @llvm.memcpy.p0i8.p1i8.i32(i8* align 4 %alloca, i8 addrspace(1)* align 4 addrspacecast (i8 addrspace(2)* getelementptr inbounds ([60 x i8], [60 x i8] addrspace(2)* @const_array, i16 0, i16 4) to i8 addrspace(1)*), i32 48, i1 false) nounwind
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br label %loop.body
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loop.body:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %loop.body ]
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%sum = phi i32 [ 0, %entry ], [ %sum.inc, %loop.body]
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%ptr = getelementptr i8, i8* %alloca, i32 %i
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%load = load i8, i8* %ptr
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%ext = zext i8 %load to i32
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%sum.inc = add i32 %sum, %ext
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%i.inc = add i32 %i, 1
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%cmp = icmp ne i32 %i, 48
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br i1 %cmp, label %loop.body, label %end
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end:
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ret i32 %sum.inc
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}
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; CHECK-LABEL: @constant_fold_null(
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; CHECK: i32 addrspace(3)* null to i32 addrspace(4)*
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define void @constant_fold_null() #0 {
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%cast = addrspacecast i32 addrspace(3)* null to i32 addrspace(4)*
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store i32 7, i32 addrspace(4)* %cast
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ret void
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}
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; CHECK-LABEL: @constant_fold_undef(
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; CHECK: ret i32 addrspace(4)* undef
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define i32 addrspace(4)* @constant_fold_undef() #0 {
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%cast = addrspacecast i32 addrspace(3)* undef to i32 addrspace(4)*
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ret i32 addrspace(4)* %cast
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}
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; CHECK-LABEL: @constant_fold_null_vector(
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; CHECK: addrspacecast (<4 x i32 addrspace(3)*> zeroinitializer to <4 x i32 addrspace(4)*>)
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define <4 x i32 addrspace(4)*> @constant_fold_null_vector() #0 {
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%cast = addrspacecast <4 x i32 addrspace(3)*> zeroinitializer to <4 x i32 addrspace(4)*>
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ret <4 x i32 addrspace(4)*> %cast
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}
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; CHECK-LABEL: @constant_fold_inttoptr(
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; CHECK: addrspacecast (i32 addrspace(3)* inttoptr (i32 -1 to i32 addrspace(3)*) to i32 addrspace(4)*)
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define void @constant_fold_inttoptr() #0 {
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%cast = addrspacecast i32 addrspace(3)* inttoptr (i32 -1 to i32 addrspace(3)*) to i32 addrspace(4)*
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store i32 7, i32 addrspace(4)* %cast
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ret void
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}
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; CHECK-LABEL: @constant_fold_gep_inttoptr(
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; CHECK: addrspacecast (i32 addrspace(3)* inttoptr (i64 1274 to i32 addrspace(3)*) to i32 addrspace(4)*)
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define void @constant_fold_gep_inttoptr() #0 {
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%k = inttoptr i32 1234 to i32 addrspace(3)*
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%gep = getelementptr i32, i32 addrspace(3)* %k, i32 10
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%cast = addrspacecast i32 addrspace(3)* %gep to i32 addrspace(4)*
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store i32 7, i32 addrspace(4)* %cast
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ret void
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}
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