28 lines
770 B
LLVM
28 lines
770 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s --passes=instcombine -S | FileCheck %s
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; This would crash if we didn't check for a negative shift.
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; https://github.com/llvm/llvm-project/issues/56424
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define i64 @PR56424(i1 %cond, i32 %arg) {
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; CHECK-LABEL: @PR56424(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: ret i64 0
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;
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entry:
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br i1 %cond, label %if.then, label %if.end
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if.then:
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%shr = ashr i32 %arg, -2
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%sext = sext i32 %shr to i64
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br label %if.end
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if.end:
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%val = phi i64 [ %sext, %if.then ], [ 0, %entry ]
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%and = and i64 -81, %val
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ret i64 %and
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}
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