http://llvm.org/bugs/show_bug.cgi?id=6065
Summary: ARM JIT should support ARMCompilationCallback in thumb2
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Backend: ARM
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
This inline-asm in ARMJITInfo.cpp's ARMCompilationCallback:
// Return to the (newly modified) stub to invoke the real function.
// The above twiddling of the saved return addresses allows us to
// deallocate everything, including the LR the stub saved, all in one
// pop instruction.
"ldmia sp!, {r0, r1, r2, r3, lr, pc}\n"
does not assemble as thumb2:
llvm[3]: Compiling ARMJITInfo.cpp for Release-Asserts build
/tmp/ccWGkQ6d.s: Assembler messages:
/tmp/ccWGkQ6d.s:28: Error: LR and PC should not both be in register list --
`ldmia sp!,{r0,r1,r2,r3,lr,pc}'
make[3]: *** [/home/nlewycky/llvm/lib/Target/ARM/Release-Asserts/ARMJITInfo.o]
Error 1
with '-Os -mthumb' flags to gcc instead of -O2.
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