260 lines
7.7 KiB
LLVM
260 lines
7.7 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn,dse -S | FileCheck %s
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target datalayout = "E-p:64:64:64-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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declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
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declare void @external(ptr)
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define i32 @test0(ptr %P) {
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; CHECK-LABEL: @test0(
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; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @external(ptr [[A]])
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; CHECK-NEXT: call void @llvm.memset.p0.i32(ptr [[P:%.*]], i8 0, i32 42, i1 false)
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; CHECK-NEXT: ret i32 0
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;
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%A = alloca i32
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call void @external(ptr %A)
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store i32 0, ptr %A
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call void @llvm.memset.p0.i32(ptr %P, i8 0, i32 42, i1 false)
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%B = load i32, ptr %A
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ret i32 %B
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}
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define i8 @test1() {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret i8 2
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;
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%A = alloca i8
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%B = alloca i8
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store i8 2, ptr %B ;; Not written to by memcpy
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call void @llvm.memcpy.p0.p0.i8(ptr %A, ptr %B, i8 -1, i1 false)
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%C = load i8, ptr %B
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ret i8 %C
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}
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define i8 @test2(ptr %P) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, ptr [[P:%.*]], i32 127
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; CHECK-NEXT: store i8 1, ptr [[P2]], align 1
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; CHECK-NEXT: call void @llvm.memset.p0.i8(ptr [[P]], i8 2, i8 127, i1 false)
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; CHECK-NEXT: ret i8 1
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;
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%P2 = getelementptr i8, ptr %P, i32 127
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store i8 1, ptr %P2 ;; Not dead across memset
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call void @llvm.memset.p0.i8(ptr %P, i8 2, i8 127, i1 false)
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%A = load i8, ptr %P2
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ret i8 %A
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}
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define i8 @test2a(ptr %P) {
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; CHECK-LABEL: @test2a(
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; CHECK-NEXT: call void @llvm.memset.p0.i8(ptr [[P:%.*]], i8 2, i8 127, i1 false)
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; CHECK-NEXT: ret i8 2
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;
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%P2 = getelementptr i8, ptr %P, i32 126
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store i8 1, ptr %P2 ;; Dead, clobbered by memset.
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call void @llvm.memset.p0.i8(ptr %P, i8 2, i8 127, i1 false)
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%A = load i8, ptr %P2
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ret i8 %A
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}
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define void @test3(ptr %P, i8 %X) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, ptr [[P:%.*]], i32 2
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 1, ptr [[P]])
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; CHECK-NEXT: store i8 2, ptr [[P2]], align 1
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; CHECK-NEXT: ret void
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;
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%Y = add i8 %X, 1 ;; Dead, because the only use (the store) is dead.
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%P2 = getelementptr i8, ptr %P, i32 2
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store i8 %Y, ptr %P2 ;; Not read by lifetime.end, should be removed.
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call void @llvm.lifetime.end.p0(i64 1, ptr %P)
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store i8 2, ptr %P2
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ret void
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}
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define void @test3a(ptr %P, i8 %X) {
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; CHECK-LABEL: @test3a(
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 10, ptr [[P:%.*]])
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; CHECK-NEXT: ret void
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;
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%Y = add i8 %X, 1 ;; Dead, because the only use (the store) is dead.
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%P2 = getelementptr i8, ptr %P, i32 2
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store i8 %Y, ptr %P2
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call void @llvm.lifetime.end.p0(i64 10, ptr %P)
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ret void
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}
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@G1 = external global i32
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@G2 = external global [4000 x i32]
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define i32 @test4(ptr %P) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: call void @llvm.memset.p0.i32(ptr @G2, i8 0, i32 4000, i1 false)
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; CHECK-NEXT: ret i32 0
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;
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%tmp = load i32, ptr @G1
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call void @llvm.memset.p0.i32(ptr @G2, i8 0, i32 4000, i1 false)
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%tmp2 = load i32, ptr @G1
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%sub = sub i32 %tmp2, %tmp
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ret i32 %sub
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}
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; Verify that basicaa is handling variable length memcpy, knowing it doesn't
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; write to G1.
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define i32 @test5(ptr %P, i32 %Len) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr @G2, ptr @G1, i32 [[LEN:%.*]], i1 false)
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; CHECK-NEXT: ret i32 0
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;
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%tmp = load i32, ptr @G1
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call void @llvm.memcpy.p0.p0.i32(ptr @G2, ptr @G1, i32 %Len, i1 false)
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%tmp2 = load i32, ptr @G1
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%sub = sub i32 %tmp2, %tmp
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ret i32 %sub
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}
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define i8 @test6(ptr %p, ptr noalias %a) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[X:%.*]] = load i8, ptr [[A:%.*]], align 1
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; CHECK-NEXT: [[T:%.*]] = va_arg ptr [[P:%.*]], float
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; CHECK-NEXT: [[Z:%.*]] = add i8 [[X]], [[X]]
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; CHECK-NEXT: ret i8 [[Z]]
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;
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%x = load i8, ptr %a
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%t = va_arg ptr %p, float
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%y = load i8, ptr %a
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%z = add i8 %x, %y
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ret i8 %z
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}
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; PR10628
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declare void @test7decl(ptr nocapture %x)
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define i32 @test7() nounwind uwtable ssp {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4
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; CHECK-NEXT: store i32 0, ptr [[X]], align 4
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; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr [[X]], i64 1
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; CHECK-NEXT: call void @test7decl(ptr [[ADD_PTR]])
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; CHECK-NEXT: [[TMP:%.*]] = load i32, ptr [[X]], align 4
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; CHECK-NEXT: ret i32 [[TMP]]
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;
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entry:
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%x = alloca i32, align 4
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store i32 0, ptr %x, align 4
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%add.ptr = getelementptr inbounds i32, ptr %x, i64 1
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call void @test7decl(ptr %add.ptr)
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%tmp = load i32, ptr %x, align 4
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ret i32 %tmp
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}
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;; Check that aa correctly handles functions marked with argmemonly
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;; attribute.
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declare i32 @func_argmemonly(ptr %P) argmemonly
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;; Can not remove redundant load, function may write to it.
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define i32 @test8(ptr %P) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[V1:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly(ptr [[P]])
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; CHECK-NEXT: [[V2:%.*]] = load i32, ptr [[P]], align 4
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; CHECK-NEXT: [[DIFF:%.*]] = sub i32 [[V1]], [[V2]]
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; CHECK-NEXT: ret i32 [[DIFF]]
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly(ptr %P)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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;; In this case load can be removed, function clobbers only %P2.
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define i32 @test9(ptr %P, ptr noalias %P2) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly(ptr [[P2:%.*]])
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; CHECK-NEXT: ret i32 0
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly(ptr %P2)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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;; In this case load can *not* be removed. Function clobers only %P2 but it may
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;; alias with %P.
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define i32 @test10(ptr %P, ptr %P2) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[V1:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly(ptr [[P2:%.*]])
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; CHECK-NEXT: [[V2:%.*]] = load i32, ptr [[P]], align 4
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; CHECK-NEXT: [[DIFF:%.*]] = sub i32 [[V1]], [[V2]]
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; CHECK-NEXT: ret i32 [[DIFF]]
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly(ptr %P2)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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define i32 @test11(ptr %P, ptr %P2) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly(ptr readonly [[P2:%.*]])
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; CHECK-NEXT: ret i32 0
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly(ptr readonly %P2)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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declare i32 @func_argmemonly_two_args(ptr %P, ptr %P2) argmemonly
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define i32 @test12(ptr %P, ptr %P2, ptr %P3) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[V1:%.*]] = load i32, ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly_two_args(ptr readonly [[P2:%.*]], ptr [[P3:%.*]])
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; CHECK-NEXT: [[V2:%.*]] = load i32, ptr [[P]], align 4
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; CHECK-NEXT: [[DIFF:%.*]] = sub i32 [[V1]], [[V2]]
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; CHECK-NEXT: ret i32 [[DIFF]]
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly_two_args(ptr readonly %P2, ptr %P3)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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define i32 @test13(ptr %P, ptr %P2) {
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: [[TMP1:%.*]] = call i32 @func_argmemonly(ptr readnone [[P2:%.*]])
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; CHECK-NEXT: ret i32 0
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;
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%V1 = load i32, ptr %P
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call i32 @func_argmemonly(ptr readnone %P2)
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%V2 = load i32, ptr %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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}
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declare void @llvm.memset.p0.i32(ptr nocapture, i8, i32, i1) nounwind
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declare void @llvm.memset.p0.i8(ptr nocapture, i8, i8, i1) nounwind
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declare void @llvm.memcpy.p0.p0.i8(ptr nocapture, ptr nocapture, i8, i1) nounwind
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declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture, i32, i1) nounwind
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