1
0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-31 16:02:52 +01:00
llvm-mirror/test/Transforms/InstCombine/or-fcmp.ll
Owen Anderson 6e3425c7e0 Just because we have determined that an (fcmp | fcmp) is true for A < B,
A == B, and A > B, does not mean we can fold it to true.  We still need to
check for A ? B (A unordered B).

llvm-svn: 123993
2011-01-21 19:39:42 +00:00

59 lines
1.6 KiB
LLVM

; RUN: opt < %s -instcombine -S | FileCheck %s
; CHECK: @t1
define zeroext i8 @t1(float %x, float %y) nounwind {
%a = fcmp ueq float %x, %y ; <i1> [#uses=1]
%b = fcmp uno float %x, %y ; <i1> [#uses=1]
%c = or i1 %a, %b
; CHECK-NOT: fcmp uno
; CHECK: fcmp ueq
%retval = zext i1 %c to i8
ret i8 %retval
}
; CHECK: @t2
define zeroext i8 @t2(float %x, float %y) nounwind {
%a = fcmp olt float %x, %y ; <i1> [#uses=1]
%b = fcmp oeq float %x, %y ; <i1> [#uses=1]
; CHECK-NOT: fcmp olt
; CHECK-NOT: fcmp oeq
; CHECK: fcmp ole
%c = or i1 %a, %b
%retval = zext i1 %c to i8
ret i8 %retval
}
; CHECK: @t3
define zeroext i8 @t3(float %x, float %y) nounwind {
%a = fcmp ult float %x, %y ; <i1> [#uses=1]
%b = fcmp uge float %x, %y ; <i1> [#uses=1]
%c = or i1 %a, %b
%retval = zext i1 %c to i8
; CHECK: ret i8 1
ret i8 %retval
}
; CHECK: @t4
define zeroext i8 @t4(float %x, float %y) nounwind {
%a = fcmp ult float %x, %y ; <i1> [#uses=1]
%b = fcmp ugt float %x, %y ; <i1> [#uses=1]
%c = or i1 %a, %b
; CHECK-NOT: fcmp ult
; CHECK-NOT: fcmp ugt
; CHECK: fcmp une
%retval = zext i1 %c to i8
ret i8 %retval
}
; CHECK: @t5
define zeroext i8 @t5(float %x, float %y) nounwind {
%a = fcmp olt float %x, %y ; <i1> [#uses=1]
%b = fcmp oge float %x, %y ; <i1> [#uses=1]
%c = or i1 %a, %b
; CHECK-NOT: fcmp olt
; CHECK-NOT: fcmp oge
; CHECK: fcmp ord
%retval = zext i1 %c to i8
ret i8 %retval
}