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| author | Chris Lattner <sabre@nondot.org> | 2009-12-21 07:16:11 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-12-21 07:16:11 +0000 |
| commit | 4c1e3da0cdd2fd0df5188dea1988beb8bf6a0dc6 (patch) | |
| tree | 3a4c864e429fdf3b6c522dc2233e454fa90e5333 /test/Transforms/LoopRotate | |
| parent | 6a363782fe4ecba4f0a72c2edf03596004470c4a (diff) | |
| download | llvm-4c1e3da0cdd2fd0df5188dea1988beb8bf6a0dc6.tar.gz llvm-4c1e3da0cdd2fd0df5188dea1988beb8bf6a0dc6.tar.bz2 llvm-4c1e3da0cdd2fd0df5188dea1988beb8bf6a0dc6.tar.xz | |
fix PR5837 by having SSAUpdate reuse phi nodes for the
'GetValueInMiddleOfBlock' case, instead of inserting
duplicates.
A similar fix is almost certainly needed by the machine-level
SSAUpdate implementation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91820 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopRotate')
| -rw-r--r-- | test/Transforms/LoopRotate/phi-duplicate.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/test/Transforms/LoopRotate/phi-duplicate.ll b/test/Transforms/LoopRotate/phi-duplicate.ll new file mode 100644 index 0000000000..cac00f826b --- /dev/null +++ b/test/Transforms/LoopRotate/phi-duplicate.ll @@ -0,0 +1,35 @@ +; RUN: opt -S %s -loop-rotate | FileCheck %s +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-apple-darwin10.0" + +; PR5837 +define void @test(i32 %N, double* %G) nounwind ssp { +entry: + br label %for.cond + +for.cond: ; preds = %for.body, %entry + %j.0 = phi i64 [ 1, %entry ], [ %inc, %for.body ] ; <i64> [#uses=5] + %cmp = icmp slt i64 %j.0, 1000 ; <i1> [#uses=1] + br i1 %cmp, label %for.body, label %for.end + +for.body: ; preds = %for.cond + %arrayidx = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1] + %tmp3 = load double* %arrayidx ; <double> [#uses=1] + %sub = sub i64 %j.0, 1 ; <i64> [#uses=1] + %arrayidx6 = getelementptr inbounds double* %G, i64 %sub ; <double*> [#uses=1] + %tmp7 = load double* %arrayidx6 ; <double> [#uses=1] + %add = fadd double %tmp3, %tmp7 ; <double> [#uses=1] + %arrayidx10 = getelementptr inbounds double* %G, i64 %j.0 ; <double*> [#uses=1] + store double %add, double* %arrayidx10 + %inc = add nsw i64 %j.0, 1 ; <i64> [#uses=1] + br label %for.cond + +for.end: ; preds = %for.cond + ret void +} +; Should only end up with one phi. +; CHECK: for.body: +; CHECK-NEXT: %j.02 = phi i64 +; CHECK-NOT phi +; CHECK: ret void + |