https://bugs.llvm.org/show_bug.cgi?id=50664
Bug ID: 50664
Summary: [MC][Thumb2] .w suffix rejected for certain ldr and
str operands
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: ARM
Assignee: unassignedb...@nondot.org
Reporter: rprich...@google.com
CC: llvm-bugs@lists.llvm.org, smithp...@googlemail.com,
ties.st...@arm.com
LLVM can assemble this Thumb2 code (clang --target=armv7a-linux-gnueabi):
.syntax unified
.thumb
ldr.w r0, [r1, #0xf00]
But not this:
.syntax unified
.thumb
ldr.w r0, [r1, #-2]
test.S:3:15: error: invalid operand for instruction
ldr.w r0, [r1, #-2]
^
It will assemble if I remove the ".w" suffix. The disassembly is then:
00000000 <.text>:
0: f851 0c02 ldr.w r0, [r1, #-2]
... which indicates a wide instruction.
Maybe the fix for bug #49118 was incomplete?
There are some similar instructions that, IIRC, use the same encoding, and have
the same problem. They're wide instructions that can only be assembled if the
".w" suffix is omitted:
ldr.w r0, [r1, #2]!
ldr.w r0, [r1], #2
ldr.w r0, [r1, #-0]
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
