forked from OSchip/llvm-project
608 lines
21 KiB
LLVM
608 lines
21 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -basic-aa -tbaa -licm -S | FileCheck %s
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; RUN: opt -aa-pipeline=tbaa,basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' -S %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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@X = global i32 7 ; <i32*> [#uses=4]
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define void @test1(i32 %i) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: Entry:
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; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: Loop:
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; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
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; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
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; CHECK: Out:
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; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
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; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
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; CHECK-NEXT: ret void
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;
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Entry:
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br label %Loop
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Loop: ; preds = %Loop, %0
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%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
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%x = load i32, i32* @X ; <i32> [#uses=1]
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%x2 = add i32 %x, 1 ; <i32> [#uses=1]
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store i32 %x2, i32* @X
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%Next = add i32 %j, 1 ; <i32> [#uses=2]
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%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
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br i1 %cond, label %Out, label %Loop
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Out:
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ret void
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}
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define void @test2(i32 %i) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: Entry:
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; CHECK-NEXT: [[DOTPROMOTED:%.*]] = load i32, i32* getelementptr inbounds (i32, i32* @X, i64 1), align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: Loop:
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; CHECK-NEXT: [[V1:%.*]] = phi i32 [ [[V:%.*]], [[LOOP]] ], [ [[DOTPROMOTED]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[V]] = add i32 [[V1]], 1
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; CHECK-NEXT: br i1 false, label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: Exit:
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; CHECK-NEXT: [[V_LCSSA:%.*]] = phi i32 [ [[V]], [[LOOP]] ]
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; CHECK-NEXT: store i32 [[V_LCSSA]], i32* getelementptr inbounds (i32, i32* @X, i64 1), align 4
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; CHECK-NEXT: ret void
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;
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Entry:
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br label %Loop
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Loop: ; preds = %Loop, %0
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%X1 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
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%A = load i32, i32* %X1 ; <i32> [#uses=1]
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%V = add i32 %A, 1 ; <i32> [#uses=1]
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%X2 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
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store i32 %V, i32* %X2
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br i1 false, label %Loop, label %Exit
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Exit: ; preds = %Loop
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ret void
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}
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define void @test3(i32 %i) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: Loop:
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; CHECK-NEXT: [[X:%.*]] = load volatile i32, i32* @X, align 4
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; CHECK-NEXT: [[X2:%.*]] = add i32 [[X]], 1
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; CHECK-NEXT: store i32 [[X2]], i32* @X, align 4
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; CHECK-NEXT: br i1 true, label [[OUT:%.*]], label [[LOOP]]
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; CHECK: Out:
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; CHECK-NEXT: ret void
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;
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br label %Loop
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Loop:
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; Should not promote this to a register
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%x = load volatile i32, i32* @X
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%x2 = add i32 %x, 1
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store i32 %x2, i32* @X
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br i1 true, label %Out, label %Loop
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Out: ; preds = %Loop
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ret void
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}
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; Should not promote this to a register
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define void @test3b(i32 %i) {
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; CHECK-LABEL: @test3b(
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: Loop:
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; CHECK-NEXT: [[X:%.*]] = load i32, i32* @X, align 4
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; CHECK-NEXT: [[X2:%.*]] = add i32 [[X]], 1
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; CHECK-NEXT: store volatile i32 [[X2]], i32* @X, align 4
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; CHECK-NEXT: br i1 true, label [[OUT:%.*]], label [[LOOP]]
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; CHECK: Out:
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; CHECK-NEXT: ret void
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;
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br label %Loop
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Loop:
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%x = load i32, i32* @X
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%x2 = add i32 %x, 1
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store volatile i32 %x2, i32* @X
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br i1 true, label %Out, label %Loop
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Out: ; preds = %Loop
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ret void
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}
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; PR8041
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; Should have promoted 'handle2' accesses.
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; Should not have promoted offsetx1 loads.
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define void @test4(i8* %x, i8 %n) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[HANDLE1:%.*]] = alloca i8*, align 8
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; CHECK-NEXT: [[HANDLE2:%.*]] = alloca i8*, align 8
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; CHECK-NEXT: store i8* [[X:%.*]], i8** [[HANDLE1]], align 8
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; CHECK-NEXT: [[TMP:%.*]] = getelementptr i8, i8* [[X]], i64 8
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; CHECK-NEXT: [[OFFSETX1:%.*]] = load i8*, i8** [[HANDLE1]], align 8
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: br label [[SUBLOOP:%.*]]
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; CHECK: subloop:
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; CHECK-NEXT: [[NEWOFFSETX21:%.*]] = phi i8* [ [[TMP]], [[LOOP]] ], [ [[NEWOFFSETX2:%.*]], [[SUBLOOP]] ]
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; CHECK-NEXT: [[COUNT:%.*]] = phi i8 [ 0, [[LOOP]] ], [ [[NEXTCOUNT:%.*]], [[SUBLOOP]] ]
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; CHECK-NEXT: store i8 [[N:%.*]], i8* [[NEWOFFSETX21]], align 1
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; CHECK-NEXT: [[NEWOFFSETX2]] = getelementptr i8, i8* [[NEWOFFSETX21]], i64 -1
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; CHECK-NEXT: [[NEXTCOUNT]] = add i8 [[COUNT]], 1
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; CHECK-NEXT: [[INNEREXITCOND:%.*]] = icmp sge i8 [[NEXTCOUNT]], 8
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; CHECK-NEXT: br i1 [[INNEREXITCOND]], label [[INNEREXIT:%.*]], label [[SUBLOOP]]
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; CHECK: innerexit:
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; CHECK-NEXT: [[NEWOFFSETX2_LCSSA:%.*]] = phi i8* [ [[NEWOFFSETX2]], [[SUBLOOP]] ]
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; CHECK-NEXT: [[VAL:%.*]] = load i8, i8* [[OFFSETX1]], align 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i8 [[VAL]], [[N]]
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: [[NEWOFFSETX2_LCSSA_LCSSA:%.*]] = phi i8* [ [[NEWOFFSETX2_LCSSA]], [[INNEREXIT]] ]
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; CHECK-NEXT: store i8* [[NEWOFFSETX2_LCSSA_LCSSA]], i8** [[HANDLE2]], align 8
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; CHECK-NEXT: ret void
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;
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%handle1 = alloca i8*
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%handle2 = alloca i8*
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store i8* %x, i8** %handle1
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br label %loop
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loop:
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%tmp = getelementptr i8, i8* %x, i64 8
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store i8* %tmp, i8** %handle2
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br label %subloop
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subloop:
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%count = phi i8 [ 0, %loop ], [ %nextcount, %subloop ]
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%offsetx2 = load i8*, i8** %handle2
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store i8 %n, i8* %offsetx2
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%newoffsetx2 = getelementptr i8, i8* %offsetx2, i64 -1
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store i8* %newoffsetx2, i8** %handle2
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%nextcount = add i8 %count, 1
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%innerexitcond = icmp sge i8 %nextcount, 8
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br i1 %innerexitcond, label %innerexit, label %subloop
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innerexit:
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%offsetx1 = load i8*, i8** %handle1
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%val = load i8, i8* %offsetx1
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%cond = icmp eq i8 %val, %n
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br i1 %cond, label %exit, label %loop
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exit:
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ret void
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}
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define void @test5(i32 %i, i32** noalias %P2) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: Entry:
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; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: Loop:
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; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
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; CHECK-NEXT: store atomic i32* @X, i32** [[P2:%.*]] monotonic, align 8
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; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
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; CHECK: Out:
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; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
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; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
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; CHECK-NEXT: ret void
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;
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Entry:
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br label %Loop
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Loop: ; preds = %Loop, %0
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%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
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%x = load i32, i32* @X ; <i32> [#uses=1]
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%x2 = add i32 %x, 1 ; <i32> [#uses=1]
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store i32 %x2, i32* @X
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store atomic i32* @X, i32** %P2 monotonic, align 8
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%Next = add i32 %j, 1 ; <i32> [#uses=2]
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%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
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br i1 %cond, label %Out, label %Loop
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Out:
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ret void
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}
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; PR14753 - Preserve TBAA tags when promoting values in a loop.
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define void @test6(i32 %n, float* nocapture %a, i32* %gi) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, i32* [[GI:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[N:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
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; CHECK: for.body.lr.ph:
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; CHECK-NEXT: [[GI_PROMOTED:%.*]] = load i32, i32* [[GI]], align 4, !tbaa [[TBAA0]]
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INC1:%.*]] = phi i32 [ [[GI_PROMOTED]], [[FOR_BODY_LR_PH]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[STOREMERGE2:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[INC]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[STOREMERGE2]] to i64
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[A:%.*]], i64 [[IDXPROM]]
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; CHECK-NEXT: store float 0.000000e+00, float* [[ARRAYIDX]], align 4, !tbaa [[TBAA4:![0-9]+]]
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; CHECK-NEXT: [[INC]] = add nsw i32 [[INC1]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
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; CHECK: for.cond.for.end_crit_edge:
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; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
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; CHECK-NEXT: store i32 [[INC_LCSSA]], i32* [[GI]], align 4, !tbaa [[TBAA0]]
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; CHECK-NEXT: br label [[FOR_END]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 0, i32* %gi, align 4, !tbaa !0
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%cmp1 = icmp slt i32 0, %n
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br i1 %cmp1, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.lr.ph, %for.body
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%storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
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%idxprom = sext i32 %storemerge2 to i64
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%arrayidx = getelementptr inbounds float, float* %a, i64 %idxprom
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store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3
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%0 = load i32, i32* %gi, align 4, !tbaa !0
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%inc = add nsw i32 %0, 1
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store i32 %inc, i32* %gi, align 4, !tbaa !0
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%cmp = icmp slt i32 %inc, %n
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
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for.cond.for.end_crit_edge: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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ret void
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}
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declare i32 @opaque(i32) argmemonly
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declare void @capture(i32*)
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; We can promote even if opaque may throw.
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define i32 @test7() {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
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; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[X2]] = call i32 @opaque(i32 [[X21]])
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; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
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; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
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; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
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; CHECK-NEXT: ret i32 [[RET]]
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;
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entry:
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%local = alloca i32
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call void @capture(i32* %local)
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br label %loop
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loop:
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%j = phi i32 [ 0, %entry ], [ %next, %loop ]
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%x = load i32, i32* %local
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%x2 = call i32 @opaque(i32 %x) ; Note this does not capture %local
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store i32 %x2, i32* %local
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%next = add i32 %j, 1
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%cond = icmp eq i32 %next, 0
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br i1 %cond, label %exit, label %loop
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exit:
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%ret = load i32, i32* %local
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ret i32 %ret
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}
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; Hoist the load even if we cannot sink the store, since the store is really
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; control-flow dependent.
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define i32 @test7bad() {
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; CHECK-LABEL: @test7bad(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
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; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X22:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X21:%.*]], [[ELSE:%.*]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[ELSE]] ]
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; CHECK-NEXT: [[X2:%.*]] = call i32 @opaque(i32 [[X22]])
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X2]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
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; CHECK: if:
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; CHECK-NEXT: store i32 [[X2]], i32* [[LOCAL]], align 4
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; CHECK-NEXT: br label [[ELSE]]
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; CHECK: else:
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; CHECK-NEXT: [[X21]] = phi i32 [ [[X2]], [[IF]] ], [ [[X22]], [[LOOP]] ]
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; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
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; CHECK-NEXT: ret i32 [[RET]]
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;
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entry:
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%local = alloca i32
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call void @capture(i32* %local)
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br label %loop
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loop:
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%j = phi i32 [ 0, %entry ], [ %next, %else ]
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%x = load i32, i32* %local
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%x2 = call i32 @opaque(i32 %x) ; Note this does not capture %local
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%cmp = icmp eq i32 %x2, 0
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br i1 %cmp, label %if, label %else
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if:
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store i32 %x2, i32* %local
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br label %else
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else:
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%next = add i32 %j, 1
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%cond = icmp eq i32 %next, 0
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br i1 %cond, label %exit, label %loop
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exit:
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%ret = load i32, i32* %local
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ret i32 %ret
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}
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; Even if neither the load nor the store or guaranteed to execute because
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; opaque() may throw, we can still promote - the load not being guaranteed
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; doesn't block us, because %local is always dereferenceable.
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define i32 @test8() {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
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; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
|
|
; CHECK-NEXT: [[THROWAWAY:%.*]] = call i32 @opaque(i32 [[J]])
|
|
; CHECK-NEXT: [[X2]] = call i32 @opaque(i32 [[X21]])
|
|
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
|
|
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
|
|
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
|
|
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%local = alloca i32
|
|
call void @capture(i32* %local)
|
|
br label %loop
|
|
|
|
loop:
|
|
%j = phi i32 [ 0, %entry ], [ %next, %loop ]
|
|
%throwaway = call i32 @opaque(i32 %j)
|
|
%x = load i32, i32* %local
|
|
%x2 = call i32 @opaque(i32 %x)
|
|
store i32 %x2, i32* %local
|
|
%next = add i32 %j, 1
|
|
%cond = icmp eq i32 %next, 0
|
|
br i1 %cond, label %exit, label %loop
|
|
|
|
exit:
|
|
%ret = load i32, i32* %local
|
|
ret i32 %ret
|
|
}
|
|
|
|
|
|
; If the store is "guaranteed modulo exceptions", and the load depends on
|
|
; control flow, we can only promote if the pointer is otherwise known to be
|
|
; dereferenceable
|
|
define i32 @test9() {
|
|
; CHECK-LABEL: @test9(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
|
|
; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[ELSE:%.*]] ]
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[ELSE]] ]
|
|
; CHECK-NEXT: [[J2:%.*]] = call i32 @opaque(i32 [[J]])
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[J2]], 0
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
|
|
; CHECK: if:
|
|
; CHECK-NEXT: br label [[ELSE]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: [[X2]] = phi i32 [ 0, [[LOOP]] ], [ [[X21]], [[IF]] ]
|
|
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
|
|
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[ELSE]] ]
|
|
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
|
|
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%local = alloca i32
|
|
call void @capture(i32* %local)
|
|
br label %loop
|
|
|
|
loop:
|
|
%j = phi i32 [ 0, %entry ], [ %next, %else ]
|
|
%j2 = call i32 @opaque(i32 %j)
|
|
%cmp = icmp eq i32 %j2, 0
|
|
br i1 %cmp, label %if, label %else
|
|
|
|
if:
|
|
%x = load i32, i32* %local
|
|
br label %else
|
|
|
|
else:
|
|
%x2 = phi i32 [ 0, %loop ], [ %x, %if]
|
|
store i32 %x2, i32* %local
|
|
%next = add i32 %j, 1
|
|
%cond = icmp eq i32 %next, 0
|
|
br i1 %cond, label %exit, label %loop
|
|
|
|
exit:
|
|
%ret = load i32, i32* %local
|
|
ret i32 %ret
|
|
}
|
|
|
|
define i32 @test9bad(i32 %i) {
|
|
; CHECK-LABEL: @test9bad(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
|
|
; CHECK-NEXT: [[NOTDEREF:%.*]] = getelementptr i32, i32* [[LOCAL]], i32 [[I:%.*]]
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[NEXT:%.*]], [[ELSE:%.*]] ]
|
|
; CHECK-NEXT: [[J2:%.*]] = call i32 @opaque(i32 [[J]])
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[J2]], 0
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[X:%.*]] = load i32, i32* [[NOTDEREF]], align 4
|
|
; CHECK-NEXT: br label [[ELSE]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: [[X2:%.*]] = phi i32 [ 0, [[LOOP]] ], [ [[X]], [[IF]] ]
|
|
; CHECK-NEXT: store i32 [[X2]], i32* [[NOTDEREF]], align 4
|
|
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
|
|
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[NOTDEREF]], align 4
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%local = alloca i32
|
|
call void @capture(i32* %local)
|
|
%notderef = getelementptr i32, i32* %local, i32 %i
|
|
br label %loop
|
|
|
|
loop:
|
|
%j = phi i32 [ 0, %entry ], [ %next, %else ]
|
|
%j2 = call i32 @opaque(i32 %j)
|
|
%cmp = icmp eq i32 %j2, 0
|
|
br i1 %cmp, label %if, label %else
|
|
|
|
if:
|
|
%x = load i32, i32* %notderef
|
|
br label %else
|
|
|
|
else:
|
|
%x2 = phi i32 [ 0, %loop ], [ %x, %if]
|
|
store i32 %x2, i32* %notderef
|
|
%next = add i32 %j, 1
|
|
%cond = icmp eq i32 %next, 0
|
|
br i1 %cond, label %exit, label %loop
|
|
|
|
exit:
|
|
%ret = load i32, i32* %notderef
|
|
ret i32 %ret
|
|
}
|
|
|
|
define void @test10(i32 %i) {
|
|
; CHECK-LABEL: @test10(
|
|
; CHECK-NEXT: Entry:
|
|
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load atomic i32, i32* @X unordered, align 4
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
|
|
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
|
|
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
|
|
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
|
|
; CHECK: Out:
|
|
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
|
|
; CHECK-NEXT: store atomic i32 [[X2_LCSSA]], i32* @X unordered, align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
Entry:
|
|
br label %Loop
|
|
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
|
|
%x = load atomic i32, i32* @X unordered, align 4
|
|
%x2 = add i32 %x, 1
|
|
store atomic i32 %x2, i32* @X unordered, align 4
|
|
%Next = add i32 %j, 1
|
|
%cond = icmp eq i32 %Next, 0
|
|
br i1 %cond, label %Out, label %Loop
|
|
|
|
Out:
|
|
ret void
|
|
|
|
}
|
|
|
|
; Early exit is known not to be taken on first iteration and thus doesn't
|
|
; effect whether load is known to execute.
|
|
define void @test11(i32 %i) {
|
|
; CHECK-LABEL: @test11(
|
|
; CHECK-NEXT: Entry:
|
|
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[BODY:%.*]] ]
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[BODY]] ]
|
|
; CHECK-NEXT: [[EARLY_TEST:%.*]] = icmp ult i32 [[J]], 32
|
|
; CHECK-NEXT: br i1 [[EARLY_TEST]], label [[BODY]], label [[EARLY:%.*]]
|
|
; CHECK: body:
|
|
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
|
|
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
|
|
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
|
|
; CHECK: Early:
|
|
; CHECK-NEXT: [[X21_LCSSA:%.*]] = phi i32 [ [[X21]], [[LOOP]] ]
|
|
; CHECK-NEXT: store i32 [[X21_LCSSA]], i32* @X, align 4
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: Out:
|
|
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[BODY]] ]
|
|
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
Entry:
|
|
br label %Loop
|
|
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%j = phi i32 [ 0, %Entry ], [ %Next, %body ] ; <i32> [#uses=1]
|
|
%early.test = icmp ult i32 %j, 32
|
|
br i1 %early.test, label %body, label %Early
|
|
body:
|
|
%x = load i32, i32* @X ; <i32> [#uses=1]
|
|
%x2 = add i32 %x, 1 ; <i32> [#uses=1]
|
|
store i32 %x2, i32* @X
|
|
%Next = add i32 %j, 1 ; <i32> [#uses=2]
|
|
%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
|
|
br i1 %cond, label %Out, label %Loop
|
|
|
|
Early:
|
|
ret void
|
|
Out:
|
|
ret void
|
|
|
|
}
|
|
|
|
!0 = !{!4, !4, i64 0}
|
|
!1 = !{!"omnipotent char", !2}
|
|
!2 = !{!"Simple C/C++ TBAA"}
|
|
!3 = !{!5, !5, i64 0}
|
|
!4 = !{!"int", !1}
|
|
!5 = !{!"float", !1}
|