http://llvm.org/bugs/show_bug.cgi?id=8466
Summary: SimplifyLibCalls behaves host-dependent(eg. nearbyint)
Product: libraries
Version: trunk
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Quoted from test/Transforms/SimplifyLibCalls/floor.ll
; Source
declare double @nearbyint(double)
define float @test_nearbyint(float %C) {
%D = fpext float %C to double
%E = call double @nearbyint( double %D ) ; --> nearbyintf
%F = fptrunc double %E to float
ret float %F
}
; Expected output
define float @test_nearbyint(float %C) {
%D = fpext float %C to double
%nearbyintf = call float @nearbyintf(float %C)
%E = fpext float %nearbyintf to double
%F = fptrunc double %E to float
ret float %F
}
With opt.exe built on Microsoft Visual Studio 10, this is not transformed.
Its behavior depends on host's HAVE_NEARBYINTF.
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