https://bugs.llvm.org/show_bug.cgi?id=45070
Bug ID: 45070
Summary: invalid instruction when using ldrht/ldrsht/ldrsbt
without immediate offset
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: ARM
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Trying to assemble these instructions without offset (which is optional
according to the ARM ARM) leads to invalid instruction:
.syntax unified
.text
.arch armv6t2
.arm
ldrht r5, [r4]
Building with:
$ llvm-mc --triple=armv6t2-linux-gnueabihf repr-armv6t2.S
.text
.arch armv6t2
.code 32
repr-armv6t2.S:5:2: error: invalid instruction, any one of the following would
fix this:
ldrht r5, [r4]
^
repr-armv6t2.S:5:16: note: too few operands for instruction
ldrht r5, [r4]
^
repr-armv6t2.S:5:2: note: instruction requires: thumb2
ldrht r5, [r4]
^
This appeared when trying to build Linux with Clang's integrated assembler:
https://github.com/ClangBuiltLinux/linux/issues/909
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