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