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[aarch32] fix bug 18268: Incorrect condition of vsel 

Given vsel_cc, op1, op2, since vsel has no LE/LT, to generate vsel for
such selection, it needs to inverse cc and swap op1 and op2. To inverse
cc, both L/G and E bits should be flipped.

llvm-svn: 197615
This commit is contained in:
Weiming Zhao 2013-12-18 22:25:17 +00:00
parent 99c7af26b7
commit 63871d255f
2 changed files with 5 additions and 5 deletions
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2
llvm/lib/Target/ARM/ARMISelLowering.cpp
View File

@ -3232,7 +3232,7 @@ SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
static ISD::CondCode getInverseCCForVSEL(ISD::CondCode CC) {
if (CC == ISD::SETNE)
return ISD::SETEQ;
return ISD::getSetCCSwappedOperands(CC);
return ISD::getSetCCInverse(CC, true);
}
static void checkVSELConstraints(ISD::CondCode CC, ARMCC::CondCodes &CondCode,

8
llvm/test/CodeGen/ARM/vsel.ll
View File

@ -61,7 +61,7 @@ define void @test_vsel32slt(i32 %lhs32, i32 %rhs32, float %a, float %b) {
%val1 = select i1 %tst1, float %a, float %b
store float %val1, float* @varfloat
; CHECK: cmp r0, r1
; CHECK: vselgt.f32 s0, s1, s0
; CHECK: vselge.f32 s0, s1, s0
ret void
}
define void @test_vsel64slt(i32 %lhs32, i32 %rhs32, double %a, double %b) {
@ -70,7 +70,7 @@ define void @test_vsel64slt(i32 %lhs32, i32 %rhs32, double %a, double %b) {
%val1 = select i1 %tst1, double %a, double %b
store double %val1, double* @vardouble
; CHECK: cmp r0, r1
; CHECK: vselgt.f64 d16, d1, d0
; CHECK: vselge.f64 d16, d1, d0
ret void
}
define void @test_vsel32sle(i32 %lhs32, i32 %rhs32, float %a, float %b) {
@ -79,7 +79,7 @@ define void @test_vsel32sle(i32 %lhs32, i32 %rhs32, float %a, float %b) {
%val1 = select i1 %tst1, float %a, float %b
store float %val1, float* @varfloat
; CHECK: cmp r0, r1
; CHECK: vselge.f32 s0, s1, s0
; CHECK: vselgt.f32 s0, s1, s0
ret void
}
define void @test_vsel64sle(i32 %lhs32, i32 %rhs32, double %a, double %b) {
@ -88,7 +88,7 @@ define void @test_vsel64sle(i32 %lhs32, i32 %rhs32, double %a, double %b) {
%val1 = select i1 %tst1, double %a, double %b
store double %val1, double* @vardouble
; CHECK: cmp r0, r1
; CHECK: vselge.f64 d16, d1, d0
; CHECK: vselgt.f64 d16, d1, d0
ret void
}
define void @test_vsel32ogt(float %lhs32, float %rhs32, float %a, float %b) {