http://llvm.org/bugs/show_bug.cgi?id=21443
Bug ID: 21443
Summary: [PPC64] Wrong register generated for inline assembler
Product: libraries
Version: trunk
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13270
--> http://llvm.org/bugs/attachment.cgi?id=13270&action=edit
.ll file demonstrating the bug
The attached file ppc_inline.ll works fine if compiled with -O0 but not with a
higher optimization level. Root cause is that a std 23, 0(0) is generated which
causes a segmentation fault.
The original source is part of the D runtime library, see here:
https://github.com/ldc-developers/druntime/blob/ldc/src/core/thread.d#L2148
The purpose of the code is to store all nonvolatile GPRs on the stack to enable
the garbage collector to scan the register values.
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