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llvm-mirror/test/CodeGen/Generic/2008-02-25-NegateZero.ll
Chris Lattner 5b4101cf68 Fix isNegatibleForFree to not return true for ConstantFP nodes
after legalize.  Just because a constant is legal (e.g. 0.0 in SSE) 
doesn't mean that its negated value is legal (-0.0).  We could make
this stronger by checking to see if the negated constant is actually
legal post negation, but it doesn't seem like a big deal.

llvm-svn: 47591
2008-02-26 07:04:54 +00:00

15 lines
434 B
LLVM

; RUN: llvm-as < %s | llc
; rdar://5763967
define void @test() {
entry:
%tmp98 = load float* null, align 4 ; <float> [#uses=1]
%tmp106 = load float* null, align 4 ; <float> [#uses=1]
%tmp113 = add float %tmp98, %tmp106 ; <float> [#uses=1]
%tmp119 = sub float %tmp113, 0.000000e+00 ; <float> [#uses=1]
call void (i32, ...)* @foo( i32 0, float 0.000000e+00, float %tmp119 ) nounwind
ret void
}
declare void @foo(i32, ...)