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llvm-project/llvm/test/CodeGen/MIR/X86/inline-asm.mir

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MIRPrinter: Avoid assert() when printing empty INLINEASM strings. CodeGen uses MO_ExternalSymbol to represent the inline assembly strings. Empty strings for symbol names appear to be invalid. For now just special case the output code to avoid hitting an `assert()` in `printLLVMNameWithoutPrefix()`. This fixes https://llvm.org/PR33317 llvm-svn: 304815
2017-06-07 03:00:58 +08:00
# RUN: llc -o - %s -mtriple=x86_64-- -run-pass none | FileCheck %s
---
# Avoid crash/assert when using an emptystring in an INLINEASM.
# CHECK-LABEL: name: emptystring
# CHECK: bb.0:
[MIR] Repurposing '$' sigil used by external symbols. Replacing with '&'. Planning to add support for named vregs. This puts is in a conundrum since physregs are named as well. To rectify this we need to use a sigil other than '%' for physregs in MIR. We've settled on using '$' for physregs but first we must repurpose it from external symbols using it, which is what this commit is all about. We think '&' will have familiar semantics for C/C++ users. llvm-svn: 322146
2018-01-10 08:56:48 +08:00
# CHECK: INLINEASM &"", 1
MIRPrinter: Avoid assert() when printing empty INLINEASM strings. CodeGen uses MO_ExternalSymbol to represent the inline assembly strings. Empty strings for symbol names appear to be invalid. For now just special case the output code to avoid hitting an `assert()` in `printLLVMNameWithoutPrefix()`. This fixes https://llvm.org/PR33317 llvm-svn: 304815
2017-06-07 03:00:58 +08:00
# CHECK: RET 0
name: emptystring
body: |
bb.0:
[MIR] Repurposing '$' sigil used by external symbols. Replacing with '&'. Planning to add support for named vregs. This puts is in a conundrum since physregs are named as well. To rectify this we need to use a sigil other than '%' for physregs in MIR. We've settled on using '$' for physregs but first we must repurpose it from external symbols using it, which is what this commit is all about. We think '&' will have familiar semantics for C/C++ users. llvm-svn: 322146
2018-01-10 08:56:48 +08:00
INLINEASM &"", 1
MIRPrinter: Avoid assert() when printing empty INLINEASM strings. CodeGen uses MO_ExternalSymbol to represent the inline assembly strings. Empty strings for symbol names appear to be invalid. For now just special case the output code to avoid hitting an `assert()` in `printLLVMNameWithoutPrefix()`. This fixes https://llvm.org/PR33317 llvm-svn: 304815
2017-06-07 03:00:58 +08:00
RET 0