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| -rw-r--r-- | test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll b/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll new file mode 100644 index 0000000..4a2579f --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll @@ -0,0 +1,21 @@ +; Don't reduce the byte access to P[i], at least not on targets that +; support an efficient 'mem[r1+r2]' addressing mode. + +; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'getelementptr.*PTR.*INDVAR' + +declare bool %pred(int) + +void %test(sbyte* %PTR) { + br label %Loop +Loop: + %INDVAR = phi int [0, %0], [%INDVAR2, %Loop] + + %STRRED = getelementptr sbyte* %PTR, int %INDVAR + store sbyte 0, sbyte* %STRRED + + %INDVAR2 = add int %INDVAR, 1 + %cond = call bool %pred(int %INDVAR2) ;; cannot eliminate indvar + br bool %cond, label %Loop, label %Out +Out: + ret void +} |