derek.holloway
7502bf64a4
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42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -passes=gvn -S | FileCheck %s --check-prefixes=CHECK,MDEP
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; RUN: opt < %s -passes='gvn<memoryssa>' -S | FileCheck %s --check-prefixes=CHECK,MSSA
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define i32 @main(ptr %p, i32 %x, i32 %y) {
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; CHECK-LABEL: define i32 @main(
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; CHECK-SAME: ptr [[P:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]]) {
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; CHECK-NEXT: [[BLOCK1:.*:]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], [[Y]]
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; CHECK-NEXT: br i1 [[CMP]], label %[[BLOCK2:.*]], label %[[BLOCK3:.*]]
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; CHECK: [[BLOCK2]]:
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; CHECK-NEXT: [[DEAD_PRE:%.*]] = load i32, ptr [[P]], align 4
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; CHECK-NEXT: br label %[[BLOCK4:.*]]
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; CHECK: [[BLOCK3]]:
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; CHECK-NEXT: store i32 0, ptr [[P]], align 4
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; CHECK-NEXT: br label %[[BLOCK4]]
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; CHECK: [[BLOCK4]]:
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; CHECK-NEXT: [[DEAD:%.*]] = phi i32 [ 0, %[[BLOCK3]] ], [ [[DEAD_PRE]], %[[BLOCK2]] ]
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; CHECK-NEXT: ret i32 [[DEAD]]
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;
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block1:
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%z = load i32, ptr %p
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%cmp = icmp eq i32 %x, %y
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br i1 %cmp, label %block2, label %block3
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block2:
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br label %block4
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block3:
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%b = bitcast i32 0 to i32
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store i32 %b, ptr %p
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br label %block4
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block4:
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%DEAD = load i32, ptr %p
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ret i32 %DEAD
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}
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; MDEP: {{.*}}
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; MSSA: {{.*}}
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