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; RUN: opt -S -instcombine < %s | FileCheck %s
define i1 @test1(float %x, float %y) nounwind {
%ext1 = fpext float %x to double
%ext2 = fpext float %y to double
%cmp = fcmp ogt double %ext1, %ext2
ret i1 %cmp
; CHECK: @test1
; CHECK-NEXT: fcmp ogt float %x, %y
}
define i1 @test2(float %a) nounwind {
%ext = fpext float %a to double
%cmp = fcmp ogt double %ext, 1.000000e+00
ret i1 %cmp
; CHECK: @test2
; CHECK-NEXT: fcmp ogt float %a, 1.0
}
define i1 @test3(float %a) nounwind {
%ext = fpext float %a to double
%cmp = fcmp ogt double %ext, 0x3FF0000000000001 ; more precision than float.
ret i1 %cmp
; CHECK: @test3
; CHECK-NEXT: fpext float %a to double
}
define i1 @test4(float %a) nounwind {
%ext = fpext float %a to double
%cmp = fcmp ogt double %ext, 0x36A0000000000000 ; denormal in float.
ret i1 %cmp
; CHECK: @test4
; CHECK-NEXT: fpext float %a to double
}
define i1 @test5(float %a) nounwind {
%neg = fsub float -0.000000e+00, %a
%cmp = fcmp ogt float %neg, 1.000000e+00
ret i1 %cmp
; CHECK: @test5
; CHECK-NEXT: fcmp olt float %a, -1.0
}
define i1 @test6(float %x, float %y) nounwind {
%neg1 = fsub float -0.000000e+00, %x
%neg2 = fsub float -0.000000e+00, %y
%cmp = fcmp ogt float %neg1, %neg2
ret i1 %cmp
; CHECK: @test6
; CHECK-NEXT: fcmp ogt float %x, %y
}
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