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| author | Nadav Rotem <nrotem@apple.com> | 2013-06-23 21:57:27 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-06-23 21:57:27 +0000 |
| commit | 0323925d5116690be55ca4657da0b356108077fb (patch) | |
| tree | ec6c5817797bc6fa93ef2df1f286d1ffe6c93a1b /llvm/test/Transforms/SLPVectorizer/X86/cse.ll | |
| parent | 14e200d14d02fd36fd1ff1fd02b9b150ce170db8 (diff) | |
| download | bcm5719-llvm-0323925d5116690be55ca4657da0b356108077fb.tar.gz bcm5719-llvm-0323925d5116690be55ca4657da0b356108077fb.zip | |
SLP Vectorizer: Fix a bug in the code that does CSE on the generated gather sequences.
Make sure that we don't replace and RAUW two sequences if one does not dominate the other.
llvm-svn: 184674
Diffstat (limited to 'llvm/test/Transforms/SLPVectorizer/X86/cse.ll')
| -rw-r--r-- | llvm/test/Transforms/SLPVectorizer/X86/cse.ll | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/cse.ll b/llvm/test/Transforms/SLPVectorizer/X86/cse.ll index 6321b007683..d286798d704 100644 --- a/llvm/test/Transforms/SLPVectorizer/X86/cse.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/cse.ll @@ -83,3 +83,54 @@ entry: ret i32 undef } +; int test2(double *G, int k) { +; if (k) { +; G[0] = 1+G[5]*4; +; G[1] = 6+G[6]*3; +; } else { +; G[2] = 7+G[5]*4; +; G[3] = 8+G[6]*3; +; } +; } + +; We can't merge the gather sequences because one does not dominate the other. +; CHECK: test2 +; CHECK: insertelement +; CHECK: insertelement +; CHECK: insertelement +; CHECK: insertelement +; CHECK: ret +define i32 @test2(double* nocapture %G, i32 %k) { + %1 = icmp eq i32 %k, 0 + %2 = getelementptr inbounds double* %G, i64 5 + %3 = load double* %2, align 8 + %4 = fmul double %3, 4.000000e+00 + br i1 %1, label %12, label %5 + +; <label>:5 ; preds = %0 + %6 = fadd double %4, 1.000000e+00 + store double %6, double* %G, align 8 + %7 = getelementptr inbounds double* %G, i64 6 + %8 = load double* %7, align 8 + %9 = fmul double %8, 3.000000e+00 + %10 = fadd double %9, 6.000000e+00 + %11 = getelementptr inbounds double* %G, i64 1 + store double %10, double* %11, align 8 + br label %20 + +; <label>:12 ; preds = %0 + %13 = fadd double %4, 7.000000e+00 + %14 = getelementptr inbounds double* %G, i64 2 + store double %13, double* %14, align 8 + %15 = getelementptr inbounds double* %G, i64 6 + %16 = load double* %15, align 8 + %17 = fmul double %16, 3.000000e+00 + %18 = fadd double %17, 8.000000e+00 + %19 = getelementptr inbounds double* %G, i64 3 + store double %18, double* %19, align 8 + br label %20 + +; <label>:20 ; preds = %12, %5 + ret i32 undef +} + |
