forked from OSchip/llvm-project
21 lines
615 B
LLVM
21 lines
615 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -O2 -mtriple=x86_64-unknown-unknown | FileCheck %s
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; Checks that a zeroing mov is inserted for the trunc/zext pair even when
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; the source of the zext is an AssertSext node
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; PR20494
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define i64 @main(i64 %a) {
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; CHECK-LABEL: main:
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; CHECK: # %bb.0:
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; CHECK-NEXT: orq $-2, %rdi
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; CHECK-NEXT: movl %edi, %eax
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; CHECK-NEXT: retq
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%or = or i64 %a, -2
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%trunc = trunc i64 %or to i32
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br label %l
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l:
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%ext = zext i32 %trunc to i64
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trunc i64 %or to i32 ; to keep the or from being narrowed
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ret i64 %ext
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}
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