derek.holloway
7502bf64a4
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50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -phi-node-folding-threshold=1 | FileCheck %s
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -phi-node-folding-threshold=2 | FileCheck %s
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -phi-node-folding-threshold=7 | FileCheck %s
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; Test merging of blocks containing complex expressions,
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; with various folding thresholds
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define i32 @test(i1 %a, i1 %b, i32 %i, i32 %j, i32 %k) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[A:%.*]], label [[M:%.*]], label [[O:%.*]]
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; CHECK: O:
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; CHECK-NEXT: [[IAJ:%.*]] = add i32 [[I:%.*]], [[J:%.*]]
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; CHECK-NEXT: [[IAJAK:%.*]] = add i32 [[IAJ]], [[K:%.*]]
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; CHECK-NEXT: [[IXJ:%.*]] = xor i32 [[I]], [[J]]
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; CHECK-NEXT: [[IXJXK:%.*]] = xor i32 [[IXJ]], [[K]]
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; CHECK-NEXT: [[WP:%.*]] = select i1 [[B:%.*]], i32 [[IAJAK]], i32 [[IXJXK]]
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; CHECK-NEXT: [[WP2:%.*]] = add i32 [[WP]], [[WP]]
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; CHECK-NEXT: br label [[M]]
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; CHECK: M:
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; CHECK-NEXT: [[W:%.*]] = phi i32 [ [[WP2]], [[O]] ], [ 2, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[R:%.*]] = add i32 [[W]], 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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entry:
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br i1 %a, label %M, label %O
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O:
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br i1 %b, label %P, label %Q
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P:
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%iaj = add i32 %i, %j
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%iajak = add i32 %iaj, %k
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br label %N
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Q:
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%ixj = xor i32 %i, %j
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%ixjxk = xor i32 %ixj, %k
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br label %N
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N:
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; This phi should be foldable if threshold >= 2
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%Wp = phi i32 [ %iajak, %P ], [ %ixjxk, %Q ]
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%Wp2 = add i32 %Wp, %Wp
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br label %M
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M:
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; This phi should be foldable if threshold >= 7
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%W = phi i32 [ %Wp2, %N ], [ 2, %entry ]
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%R = add i32 %W, 1
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ret i32 %R
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}
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