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| author | Bob Wilson <bob.wilson@apple.com> | 2009-04-09 17:16:43 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2009-04-09 17:16:43 +0000 |
| commit | d9df5017040489303acb57bdd8697ef0f8bafc08 (patch) | |
| tree | 894d9bc70b3f7019ebfc3c0950f9133059a50638 /test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll | |
| parent | 37831d0a1202ab105b495762cb6cce7b6eb2438c (diff) | |
| download | external_llvm-d9df5017040489303acb57bdd8697ef0f8bafc08.zip external_llvm-d9df5017040489303acb57bdd8697ef0f8bafc08.tar.gz external_llvm-d9df5017040489303acb57bdd8697ef0f8bafc08.tar.bz2 | |
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).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68714 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll')
| -rw-r--r-- | test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll b/test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll new file mode 100644 index 0000000..223fa0f --- /dev/null +++ b/test/CodeGen/ARM/2009-04-09-RegScavengerAsm.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llc -march=arm +; 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 +} |