llvm/test/CodeGen/X86/inline-asm-flag-clobber.ll
Daniel Sanders 38c6b58eec Re-commit: Demote EmitRawText call in AsmPrinter::EmitInlineAsm() and remove hasRawTextSupport() call
Summary:
AsmPrinter::EmitInlineAsm() will no longer use the EmitRawText() call for
targets with mature MC support. Such targets will always parse the inline
assembly (even when emitting assembly). Targets without mature MC support
continue to use EmitRawText() for assembly output.

The hasRawTextSupport() check in AsmPrinter::EmitInlineAsm() has been replaced
with MCAsmInfo::UseIntegratedAs which when true, causes the integrated assembler
to parse inline assembly (even when emitting assembly output). UseIntegratedAs
is set to true for targets that consider any failure to parse valid assembly
to be a bug. Target specific subclasses generally enable the integrated
assembler in their constructor. The default value can be overridden with
-no-integrated-as.

All tests that rely on inline assembly supporting invalid assembly (for example,
those that use mnemonics such as 'foo' or 'hello world') have been updated to
disable the integrated assembler.

Changes since review (and last commit attempt):
- Fixed test failures that were missed due to configuration of local build.
  (fixes crash.ll and a couple others).
- Fixed tests that happened to pass because the local build was on X86
  (should fix 2007-12-17-InvokeAsm.ll)
- mature-mc-support.ll's should no longer require all targets to be compiled.
  (should fix ARM and PPC buildbots)
- Object output (-filetype=obj and similar) now forces the integrated assembler
  to be enabled regardless of default setting or -no-integrated-as.
  (should fix SystemZ buildbots)

Reviewers: rafael

Reviewed By: rafael

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2686



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201333 91177308-0d34-0410-b5e6-96231b3b80d8
2014-02-13 14:44:26 +00:00

33 lines
992 B
LLVM

; RUN: llc -march=x86-64 -no-integrated-as < %s | FileCheck %s
; PR3701
define i64 @t(i64* %arg) nounwind {
br i1 true, label %1, label %5
; <label>:1 ; preds = %0
%2 = icmp eq i64* null, %arg ; <i1> [#uses=1]
%3 = tail call i64* asm sideeffect "movl %fs:0,$0", "=r,~{dirflag},~{fpsr},~{flags}"() nounwind ; <%struct.thread*> [#uses=0]
; CHECK: test
; CHECK-NEXT: j
br i1 %2, label %4, label %5
; <label>:4 ; preds = %1
ret i64 1
; <label>:5 ; preds = %1
ret i64 0
}
; Make sure that we translate this to the bswap intrinsic which lowers down without the
; inline assembly.
; CHECK-NOT: #APP
define i32 @s(i32 %argc, i8** nocapture %argv) unnamed_addr nounwind {
entry:
%0 = trunc i32 %argc to i16
%asmtmp = tail call i16 asm "rorw $$8, ${0:w}", "=r,0,~{fpsr},~{flags},~{cc}"(i16 %0) nounwind, !srcloc !0
%1 = zext i16 %asmtmp to i32
ret i32 %1
}
!0 = metadata !{i64 935930}