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23c462a8b5
This allows targets to make more decisions about reserved registers after isel. For example, now it should be certain there are calls or stack objects in the frame or not, which could have been introduced by legalization. Patch by Matthias Braun llvm-svn: 363757
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; RUN: llc -mtriple=arm64--- -stop-after=finalize-isel -o - %s | FileCheck %s
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; Check that we ignore the zeroext attribute on the return type of the tail
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; call, since the return value is unused. This happens during CodeGenPrepare in
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; dupRetToEnableTailCallOpts, which calls attributesPermitTailCall to check if
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; the attributes of the caller and the callee match.
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declare zeroext i1 @zcallee()
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define void @zcaller() {
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; CHECK-LABEL: name: zcaller
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entry:
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br i1 undef, label %calllabel, label %retlabel
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calllabel:
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; CHECK: bb.1.calllabel:
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; CHECK-NOT: BL @zcallee
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; CHECK-NEXT: TCRETURNdi @zcallee
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%unused_result = tail call zeroext i1 @zcallee()
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br label %retlabel
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retlabel:
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ret void
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}
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declare signext i1 @scallee()
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define void @scaller() {
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; CHECK-LABEL: name: scaller
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entry:
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br i1 undef, label %calllabel, label %retlabel
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calllabel:
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; CHECK: bb.1.calllabel:
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; CHECK-NOT: BL @scallee
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; CHECK-NEXT: TCRETURNdi @scallee
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%unused_result = tail call signext i1 @scallee()
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br label %retlabel
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retlabel:
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ret void
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}
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