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llvm-project/llvm/test/MC/X86/pr37425.s

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[MC][X86] Enhance X86 Register expression handling to more closely match GCC. Allow the comparison of x86 registers in the evaluation of assembler directives. This generalizes and simplifies the extension from r334022 to catch another case found in the Linux kernel. Reviewers: rnk, void Reviewed By: rnk Subscribers: hiraditya, nickdesaulniers, llvm-commits Differential Revision: https://reviews.llvm.org/D50795 llvm-svn: 339895
2018-08-17 00:31:14 +08:00
// RUN: llvm-mc -triple x86_64-unknown-unknown %s -o - | FileCheck %s
[MC][X86] Allow assembler variable assignment to register name. Summary: Allow extended parsing of variable assembler assignment syntax and modify X86 to permit VAR = register assignment. As we emit these as .set directives when possible, we inline such expressions in output assembly. Fixes PR37425. Reviewers: rnk, void, echristo Reviewed By: rnk Subscribers: nickdesaulniers, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D47545 llvm-svn: 334022
2018-06-05 23:13:39 +08:00
// CHECK-NOT: .set var_xdata
var_xdata = %rcx
// CHECK: xorq %rcx, %rcx
xorq var_xdata, var_xdata
[MC][X86] Enhance X86 Register expression handling to more closely match GCC. Allow the comparison of x86 registers in the evaluation of assembler directives. This generalizes and simplifies the extension from r334022 to catch another case found in the Linux kernel. Reviewers: rnk, void Reviewed By: rnk Subscribers: hiraditya, nickdesaulniers, llvm-commits Differential Revision: https://reviews.llvm.org/D50795 llvm-svn: 339895
2018-08-17 00:31:14 +08:00
// CHECK: .data
// CHECK-NEXT: .byte 1
.data
.if var_xdata == %rax
.byte 0
.elseif var_xdata == %rcx
.byte 1
.else
.byte 2
.endif
[MC][X86] Allow assembler variable assignment to register name. Summary: Allow extended parsing of variable assembler assignment syntax and modify X86 to permit VAR = register assignment. As we emit these as .set directives when possible, we inline such expressions in output assembly. Fixes PR37425. Reviewers: rnk, void, echristo Reviewed By: rnk Subscribers: nickdesaulniers, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D47545 llvm-svn: 334022
2018-06-05 23:13:39 +08:00