36 lines
905 B
LLVM
36 lines
905 B
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
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; Make sure dagcombine doesn't eliminate the comparison due
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; to an off-by-one bug with computeKnownBits information.
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declare void @qux()
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define void @foo(i32 %a) {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0:
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; CHECK-NEXT: shrl $23, %edi
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; CHECK-NEXT: testl $256, %edi # imm = 0x100
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; CHECK-NEXT: jne .LBB0_2
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; CHECK-NEXT: # %bb.1: # %true
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq qux
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; CHECK-NEXT: popq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .LBB0_2: # %false
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; CHECK-NEXT: retq
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%t0 = lshr i32 %a, 23
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br label %next
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next:
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%t1 = and i32 %t0, 256
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%t2 = icmp eq i32 %t1, 0
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br i1 %t2, label %true, label %false
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true:
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call void @qux()
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ret void
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false:
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ret void
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}
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