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fix PR6761, a miscompilation due to the fp->int IV conversion 

stuff.  More bugs remain though.

llvm-svn: 100282
This commit is contained in:
Chris Lattner 2010-04-03 06:30:03 +00:00
parent 2508bcf176
commit 40ea690f39
2 changed files with 25 additions and 6 deletions
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4
llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
View File

@ -709,9 +709,9 @@ void IndVarSimplify::HandleFloatingPointIV(Loop *L, PHINode *PN) {
case CmpInst::FCMP_OGE:
case CmpInst::FCMP_UGE: NewPred = CmpInst::ICMP_SGE; break;
case CmpInst::FCMP_OLT:
case CmpInst::FCMP_ULT: NewPred = CmpInst::ICMP_ULT; break;
case CmpInst::FCMP_ULT: NewPred = CmpInst::ICMP_SLT; break;
case CmpInst::FCMP_OLE:
case CmpInst::FCMP_ULE: NewPred = CmpInst::ICMP_ULE; break;
case CmpInst::FCMP_ULE: NewPred = CmpInst::ICMP_SLE; break;
}
const IntegerType *Int32Ty = Type::getInt32Ty(PN->getContext());

27
llvm/test/Transforms/IndVarSimplify/floating-point-iv.ll
View File

@ -41,10 +41,10 @@ entry:
br label %bb
bb: ; preds = %bb, %entry
%x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ] ; <double> [#uses=2]
%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind ; <i32> [#uses=0]
%1 = fadd double %x.0.reg2mem.0, 1.000000e+00 ; <double> [#uses=2]
%2 = fcmp olt double %1, -1.000000e+00 ; <i1> [#uses=1]
%x.0.reg2mem.0 = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
%0 = tail call i32 @foo(double %x.0.reg2mem.0) nounwind
%1 = fadd double %x.0.reg2mem.0, 1.000000e+00
%2 = fcmp olt double %1, -1.000000e+00
br i1 %2, label %bb, label %return
return: ; preds = %bb
@ -70,4 +70,23 @@ return: ; preds = %bb
; CHECK: icmp
}
; PR6761
define void @test5() nounwind {
; <label>:0
br label %1
; <label>:1 ; preds = %1, %0
%2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ] ; <double> [#uses=1]
%3 = tail call i32 @foo(double 0.0) ; <i32> [#uses=0]
%4 = fadd double %2, -1.000000e+00 ; <double> [#uses=2]
%5 = fcmp ult double %4, 0.000000e+00 ; <i1> [#uses=1]
br i1 %5, label %exit, label %1
exit:
ret void
; CHECK: @test5
; CHECK: icmp eq i32 {{.*}}, 10
; CHECK-NEXT: br i1
}