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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AArch64/tail-call-unused-zext.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

37 lines
1.0 KiB
LLVM

; RUN: llc -mtriple=arm64--- -stop-after=finalize-isel -o - %s | FileCheck %s
; Check that we ignore the zeroext attribute on the return type of the tail
; call, since the return value is unused. This happens during CodeGenPrepare in
; dupRetToEnableTailCallOpts, which calls attributesPermitTailCall to check if
; the attributes of the caller and the callee match.
declare zeroext i1 @zcallee()
define void @zcaller(i1 %arg) {
; CHECK-LABEL: name: zcaller
entry:
br i1 %arg, label %calllabel, label %retlabel
calllabel:
; CHECK: bb.1.calllabel:
; CHECK-NOT: BL @zcallee
; CHECK-NEXT: TCRETURNdi @zcallee
%unused_result = tail call zeroext i1 @zcallee()
br label %retlabel
retlabel:
ret void
}
declare signext i1 @scallee()
define void @scaller(i1 %arg) {
; CHECK-LABEL: name: scaller
entry:
br i1 %arg, label %calllabel, label %retlabel
calllabel:
; CHECK: bb.1.calllabel:
; CHECK-NOT: BL @scallee
; CHECK-NEXT: TCRETURNdi @scallee
%unused_result = tail call signext i1 @scallee()
br label %retlabel
retlabel:
ret void
}