derek.holloway
7502bf64a4
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30 lines
901 B
LLVM
30 lines
901 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=simplifycfg -S < %s | FileCheck %s
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; sdiv INT_MIN / -1 should not be speculated.
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define i32 @test(i1 %cmp) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: br i1 [[CMP:%.*]], label [[IF:%.*]], label [[COMMON_RET:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 -2147483648, -1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ne i32 [[DIV]], 0
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[CMP2]], i32 1, i32 0
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[SPEC_SELECT]], [[IF]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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;
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br i1 %cmp, label %if, label %else
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if:
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%div = sdiv i32 -2147483648, -1
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%cmp2 = icmp ne i32 %div, 0
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br i1 %cmp2, label %end, label %else
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else:
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ret i32 0
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end:
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ret i32 1
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}
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