a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
23 lines
694 B
LLVM
23 lines
694 B
LLVM
; Test that the backend does not mess up the I/R in case of a use of an undef
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; register. This typically happens while expanding a pseudo or otherwise
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; replacing an instruction for another.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs | FileCheck %s
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; LLCRMux
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define void @f1(ptr) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: *** Bad machine code: Using an undefined physical register ***
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BB:
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%L5 = load i8, ptr %0
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%B9 = lshr i8 %L5, -1
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br label %CF
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CF: ; preds = %CF, %BB
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%Cmp25 = icmp ne i8 27, %B9
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br i1 %Cmp25, label %CF, label %CF34
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CF34: ; preds = %CF
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ret void
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}
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