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| author | Hal Finkel <hfinkel@anl.gov> | 2013-05-16 16:52:41 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-05-16 16:52:41 +0000 |
| commit | 2a5e8c328eb0d957f00190c0c6189a4f1fef1117 (patch) | |
| tree | 2c7289bb9b2283f5de88b99124ff98623f157dcc | |
| parent | 3e521a5223e548748725c8b19d964d8e6de4fc82 (diff) | |
PPC32 cannot form counter loops around i64 FP conversions
On PPC32, i64 FP conversions are implemented using runtime calls (which clobber
the counter register). These must be excluded.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182023 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/PowerPC/PPCCTRLoops.cpp | 6 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/ctrloop-fp64.ll | 28 |
2 files changed, 33 insertions, 1 deletions
diff --git a/lib/Target/PowerPC/PPCCTRLoops.cpp b/lib/Target/PowerPC/PPCCTRLoops.cpp index ae5d9184605..6bbd571894d 100644 --- a/lib/Target/PowerPC/PPCCTRLoops.cpp +++ b/lib/Target/PowerPC/PPCCTRLoops.cpp @@ -305,7 +305,11 @@ bool PPCCTRLoops::convertToCTRLoop(Loop *L) { isa<FPToUIInst>(J) || isa<FPToSIInst>(J)) { CastInst *CI = cast<CastInst>(J); if (CI->getSrcTy()->getScalarType()->isPPC_FP128Ty() || - CI->getDestTy()->getScalarType()->isPPC_FP128Ty()) + CI->getDestTy()->getScalarType()->isPPC_FP128Ty() || + (TT.isArch32Bit() && + (CI->getSrcTy()->getScalarType()->isIntegerTy(64) || + CI->getDestTy()->getScalarType()->isIntegerTy(64)) + )) return MadeChange; } else if (isa<IndirectBrInst>(J) || isa<InvokeInst>(J)) { // On PowerPC, indirect jumps use the counter register. diff --git a/test/CodeGen/PowerPC/ctrloop-fp64.ll b/test/CodeGen/PowerPC/ctrloop-fp64.ll new file mode 100644 index 00000000000..78974248da5 --- /dev/null +++ b/test/CodeGen/PowerPC/ctrloop-fp64.ll @@ -0,0 +1,28 @@ +; RUN: llc < %s -mcpu=generic | FileCheck %s + +target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32" +target triple = "powerpc-unknown-linux-gnu" + +define i64 @foo(double* nocapture %n) nounwind readonly { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ] + %x.05 = phi i64 [ 0, %entry ], [ %conv1, %for.body ] + %arrayidx = getelementptr inbounds double* %n, i32 %i.06 + %0 = load double* %arrayidx, align 8 + %conv = sitofp i64 %x.05 to double + %add = fadd double %conv, %0 + %conv1 = fptosi double %add to i64 + %inc = add nsw i32 %i.06, 1 + %exitcond = icmp eq i32 %inc, 2048 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret i64 %conv1 +} + +; CHECK: @foo +; CHECK-NOT: mtctr + |