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InstCombine: Add a couple of fabs identities for comparing with 0.0.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-08-18 20:06:47 +00:00
parent 2b74957106
commit 00abcd3da0
2 changed files with 121 additions and 0 deletions
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82
test/Transforms/InstCombine/fcmp.ll
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@@ -69,3 +69,85 @@ define float @test8(float %x) nounwind readnone optsize ssp {
; CHECK: @test8
; CHECK-NEXT: fcmp olt float %x, 0.000000e+00
}
declare double @fabs(double) nounwind readnone
define i32 @test9(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp olt double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test9
; CHECK-NOT: fabs
; CHECK: ret i32 0
}
define i32 @test10(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp ole double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test10
; CHECK-NOT: fabs
; CHECK: fcmp oeq double %a, 0.000000e+00
}
define i32 @test11(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp ogt double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test11
; CHECK-NOT: fabs
; CHECK: fcmp one double %a, 0.000000e+00
}
define i32 @test12(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp oge double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test12
; CHECK-NOT: fabs
; CHECK: fcmp ord double %a, 0.000000e+00
}
define i32 @test13(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp une double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test13
; CHECK-NOT: fabs
; CHECK: fcmp une double %a, 0.000000e+00
}
define i32 @test14(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp oeq double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test14
; CHECK-NOT: fabs
; CHECK: fcmp oeq double %a, 0.000000e+00
}
define i32 @test15(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp one double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test15
; CHECK-NOT: fabs
; CHECK: fcmp one double %a, 0.000000e+00
}
define i32 @test16(double %a) nounwind {
%call = tail call double @fabs(double %a) nounwind
%cmp = fcmp ueq double %call, 0.000000e+00
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: @test16
; CHECK-NOT: fabs
; CHECK: fcmp ueq double %a, 0.000000e+00
}