[LLVMbugs] [Bug 22081] New: target-features function attribute does not apply in 32-bit x86 target

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22081

            Bug ID: 22081
           Summary: target-features function attribute does not apply in
                    32-bit x86 target
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: sanxiyn at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

r225079.

Using target-features function attribute +sse2 does not cause 32-bit x86 code
generator to use SSE. Using command line flag -mattr=+sse2 does.

$ cat test.ll
define double @inv(double %x) #0 {
entry:
  %div = fdiv double 1.0, %x
  ret double %div
}
attributes #0 = { "target-features"="+sse2" }

$ llc test.ll -o -
inv:
  fld1
  fdivl 4(%esp)
  retl

$ llc -mattr=+sse2 test.ll -o -
inv:
  subl $12, %esp
  movsd .LCPI0_0, %xmm0
  divsd 16(%esp), %xmm0
  movsd %xmm0, (%esp)
  fldl (%esp)
  addl $12, %esp
  retl

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