https://bugs.llvm.org/show_bug.cgi?id=44858
Bug ID: 44858
Summary: Load register with negative immediate leads to
'invalid instruction'
Product: libraries
Version: 10.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: ARM
Assignee: unassignedb...@nondot.org
Reporter: ste...@agner.ch
CC: llvm-bugs@lists.llvm.org, peter.sm...@linaro.org,
ties.st...@arm.com
Created attachment 23111
--> https://bugs.llvm.org/attachment.cgi?id=23111&action=edit
reproducer assembly
Trying to use Encoding T4 of LDR (immediate, Thumb) which allows a negative
immediate leads to `invalid instruction`:
$ llvm-mc -triple=armv7-linux-gnueabi repr-wrong-selection.s
.text
.code 16
.globl _start
_start:
repr-wrong-selection.s:6:2: error: invalid instruction
ldr.w r3, [r1, #-4]!
^
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