http://llvm.org/bugs/show_bug.cgi?id=17674
Bug ID: 17674
Summary: [AArch64] MachineInstr verifier fails due to nested
ADJCALLSTACK
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: ARM
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 11419
--> http://llvm.org/bugs/attachment.cgi?id=11419&action=edit
Test case
When attempting to codegen the attached test case using llc -march=aarch64
-verify-machineinstrs we get a verifier fault ending with:
*** Bad machine code: FrameSetup is after another FrameSetup ***
- function: ch63
- basic block: BB#0 entry (0x1c98900)
- instruction: ADJCALLSTACKDOWN 0, %XSP<imp-def,dead>, %XSP<imp-use>
*** Bad machine code: FrameDestroy is not after a FrameSetup ***
- function: ch63
- basic block: BB#0 entry (0x1c98900)
- instruction: ADJCALLSTACKUP 0, 0, %XSP<imp-def,dead>, %XSP<imp-use>
LLVM ERROR: Found 2 machine code errors.
Filing as a bug since the AArch64 backend should emit verifier-friendly code.
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