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author | Andrew Trick <atrick@apple.com> | 2012-05-22 17:39:59 +0000 |
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committer | Andrew Trick <atrick@apple.com> | 2012-05-22 17:39:59 +0000 |
commit | 3de8ad8bf9081fcb7ec0600fd2a8d1ce809f556d (patch) | |
tree | a49e2f9d56a995a8f8b37c6a4fdcfdf39d3369b3 /test/Transforms/LoopStrengthReduce/X86 | |
parent | 5c525b59d5e0036a778d278eeff4832edfd41357 (diff) | |
download | external_llvm-3de8ad8bf9081fcb7ec0600fd2a8d1ce809f556d.zip external_llvm-3de8ad8bf9081fcb7ec0600fd2a8d1ce809f556d.tar.gz external_llvm-3de8ad8bf9081fcb7ec0600fd2a8d1ce809f556d.tar.bz2 |
LSR fix: add a missing phi check during IV hoisting.
Fixes PR12898: SCEVExpander crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157263 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopStrengthReduce/X86')
-rw-r--r-- | test/Transforms/LoopStrengthReduce/X86/2012-01-13-phielim.ll | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/X86/2012-01-13-phielim.ll b/test/Transforms/LoopStrengthReduce/X86/2012-01-13-phielim.ll index ed32ca8..a9b815f 100644 --- a/test/Transforms/LoopStrengthReduce/X86/2012-01-13-phielim.ll +++ b/test/Transforms/LoopStrengthReduce/X86/2012-01-13-phielim.ll @@ -90,3 +90,60 @@ for.inc498: ; preds = %for.inc498, %for.bo while.end: ; preds = %entry ret void } + +; PR12898: SCEVExpander crash +; Test redundant phi elimination when the deleted phi's increment is +; itself a phi. +; +; CHECK: @test3 +; CHECK: %for.body3.lr.ph.us.i.loopexit +; CHECK-NEXT: in Loop: Header +; CHECK-NEXT: incq +; CHECK-NEXT: .align +; CHECK-NEXT: %for.body3.us.i +; CHECK-NEXT: Inner Loop +; CHECK: testb +; CHECK: jne +; CHECK: jmp +define fastcc void @test3(double* nocapture %u) nounwind uwtable ssp { +entry: + br i1 undef, label %meshBB1, label %meshBB5 + +for.inc8.us.i: ; preds = %for.body3.us.i + br i1 undef, label %meshBB1, label %meshBB + +for.body3.us.i: ; preds = %meshBB, %for.body3.lr.ph.us.i + %indvars.iv.i.SV.phi = phi i64 [ %indvars.iv.next.i, %meshBB ], [ 0, %for.body3.lr.ph.us.i ] + %storemerge13.us.i.SV.phi = phi i32 [ 0, %meshBB ], [ 0, %for.body3.lr.ph.us.i ] + %Opq.sa.calc12 = sub i32 undef, 227 + %0 = add nsw i64 %indvars.iv.i.SV.phi, %indvars.iv8.i.SV.phi26 + %1 = trunc i64 %0 to i32 + %mul.i.us.i = mul nsw i32 0, %1 + %arrayidx5.us.i = getelementptr inbounds double* %u, i64 %indvars.iv.i.SV.phi + %2 = load double* %arrayidx5.us.i, align 8 + %indvars.iv.next.i = add i64 %indvars.iv.i.SV.phi, 1 + br i1 undef, label %for.inc8.us.i, label %meshBB + +for.body3.lr.ph.us.i: ; preds = %meshBB1, %meshBB + %indvars.iv8.i.SV.phi26 = phi i64 [ undef, %meshBB1 ], [ %indvars.iv8.i.SV.phi24, %meshBB ] + %arrayidx.us.i = getelementptr inbounds double* undef, i64 %indvars.iv8.i.SV.phi26 + %3 = add i64 %indvars.iv8.i.SV.phi26, 1 + br label %for.body3.us.i + +for.inc8.us.i2: ; preds = %meshBB5 + unreachable + +eval_At_times_u.exit: ; preds = %meshBB5 + ret void + +meshBB: ; preds = %for.body3.us.i, %for.inc8.us.i + %indvars.iv8.i.SV.phi24 = phi i64 [ undef, %for.body3.us.i ], [ %3, %for.inc8.us.i ] + %meshStackVariable.phi = phi i32 [ %Opq.sa.calc12, %for.body3.us.i ], [ undef, %for.inc8.us.i ] + br i1 undef, label %for.body3.lr.ph.us.i, label %for.body3.us.i + +meshBB1: ; preds = %for.inc8.us.i, %entry + br label %for.body3.lr.ph.us.i + +meshBB5: ; preds = %entry + br i1 undef, label %eval_At_times_u.exit, label %for.inc8.us.i2 +} |