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llvm-project/llvm/test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll

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ARM: fixup tests to specify the target more explicitly This changes the tests that were targeting ARM EABI to explicitly specify the environment rather than relying on the default. This breaks with the new Windows on ARM support when running the tests on Windows where the default environment is no longer EABI. Take the opportunity to avoid a pointless redirect (helps when trying to debug with providing a command line invocation which can be copy and pasted) and removing a few greps in favour of FileCheck. llvm-svn: 205465
2014-04-03 05:22:03 +08:00
; RUN: llc -mtriple=arm-eabi %s -o /dev/null
Fix pr3954. The register scavenger asserts for inline assembly with register destinations that are tied to source operands. The TargetInstrDescr::findTiedToSrcOperand method silently fails for inline assembly. The existing MachineInstr::isRegReDefinedByTwoAddr was very close to doing what is needed, so this revision makes a few changes to that method and also renames it to isRegTiedToUseOperand (for consistency with the very similar isRegTiedToDefOperand and because it handles both two-address instructions and inline assembly with tied registers). llvm-svn: 68714
2009-04-10 01:16:43 +08:00
; PR3954
define void @foo(...) nounwind {
entry:
%rr = alloca i32 ; <i32*> [#uses=2]
%0 = load i32* %rr ; <i32> [#uses=1]
%1 = call i32 asm "nop", "=r,0"(i32 %0) nounwind ; <i32> [#uses=1]
store i32 %1, i32* %rr
br label %return
return: ; preds = %entry
ret void
}