llvm-mirror/test/CodeGen/X86/fast-isel-fneg.ll

; RUN: llc < %s -fast-isel -fast-isel-abort -march=x86-64 | FileCheck %s
; RUN: llc < %s -fast-isel -march=x86 -mattr=+sse2 | grep xor | count 2

; CHECK: doo:
; CHECK: xor
define double @doo(double %x) nounwind {
  %y = fsub double -0.0, %x
  ret double %y
}

; CHECK: foo:
; CHECK: xor
define float @foo(float %x) nounwind {
  %y = fsub float -0.0, %x
  ret float %y
}
Reapply r81171 with a fix: don't try to use i64 when it isn't legal. llvm-svn: 81492 2009-09-11 02:34:46 +02:00			`; RUN: llc < %s -fast-isel -fast-isel-abort -march=x86-64 \| FileCheck %s`
Add -mattr=+sse2 to the -march=x86 version of this test. Without sse, this code falls back to SelectionDAG isel which uses an x87 instruction, which is fine, but not what this test is testing for. llvm-svn: 81656 2009-09-13 01:45:47 +02:00			`; RUN: llc < %s -fast-isel -march=x86 -mattr=+sse2 \| grep xor \| count 2`
LLVM currently represents floating-point negation as -0.0 - x. Fix FastISel to recognize this pattern and emit a floating-point negation using xor. llvm-svn: 80963 2009-09-04 00:53:57 +02:00
			`; CHECK: doo:`
Reapply r81171 with a fix: don't try to use i64 when it isn't legal. llvm-svn: 81492 2009-09-11 02:34:46 +02:00			`; CHECK: xor`
LLVM currently represents floating-point negation as -0.0 - x. Fix FastISel to recognize this pattern and emit a floating-point negation using xor. llvm-svn: 80963 2009-09-04 00:53:57 +02:00			`define double @doo(double %x) nounwind {`
			`%y = fsub double -0.0, %x`
			`ret double %y`
			`}`

			`; CHECK: foo:`
Reapply r81171 with a fix: don't try to use i64 when it isn't legal. llvm-svn: 81492 2009-09-11 02:34:46 +02:00			`; CHECK: xor`
LLVM currently represents floating-point negation as -0.0 - x. Fix FastISel to recognize this pattern and emit a floating-point negation using xor. llvm-svn: 80963 2009-09-04 00:53:57 +02:00			`define float @foo(float %x) nounwind {`
			`%y = fsub float -0.0, %x`
			`ret float %y`
			`}`