http://llvm.org/bugs/show_bug.cgi?id=16350
Bug ID: 16350
Summary: Cortex M0 supports WFE but LLC does not allow it
Product: tools
Version: 3.2
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: llc
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Hello,
When trying to compile, I get the following error:
...\bin\MinSizeRel>llc C:\...\tmp-49f01283-2ef0-45f5-9da2-
19446f5b511d.tmp -mtriple=thumbv6m-none-eabi -filetype=obj -mcpu=cortex-m0
-o=test.elf
<inline asm>:1:2: error: instruction requires: thumb2
wfe
^
However, if I switch to Thumb 2 (thumbv7m-none-eabi), it uses CBNZ, which
Cortex M0 does not have. Cortex M0 is mostly Thumb but with a tiny bit of Thumb
2, and I think WFE is among that missing.
Have a good day
James
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