http://llvm.org/bugs/show_bug.cgi?id=9932
Summary: BX LR does not work in Thumb
Product: libraries
Version: 2.9
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P
Component: Backend: ARM
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6602)
--> (http://llvm.org/bugs/attachment.cgi?id=6602)
The testme.s file
BX LR is a rather important instruction, but it does not work in Thumb mode.
Here is my output. I am targeting Cortex-M3.
C:\Code\src\thirdp\llvm-bin\bin\Release>llc -march=thumb -mattr=+thumb2
-filetype=obj -o testme.x te
stme.s
<inline asm>:2:4: error: invalid operand for instruction
it vs
^
<inline asm>:4:1: error: instruction requires a CPU feature not currently
enabled
bx lr
^
LLVM ERROR: Error parsing inline asm
Stack dump:
0. Program arguments: llc -march=thumb -mattr=+thumb2 -filetype=obj -o
testme.x testme.s
1. Running pass 'Function Pass Manager' on module 'testme.s'.
2. Running pass 'ARM Assembly Printer' on function '@test'
For what it's worth, IT VS also appears to not work (it doesn't even understand
the *instruction* ITT)...
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