From 7abfec8734d1e94c211a88075d1b251180658c76 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 6 Mar 2005 22:15:24 +0000 Subject: [PATCH] Add testcase for this: (3) Do not reduce element sizes of small power of two: char s[10]; for (i) ...s[i] ... when the indvar is not eliminable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20502 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../LoopStrengthReduce/dont_reduce_bytes.ll | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll diff --git a/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll b/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll new file mode 100644 index 00000000000..4a2579fd2c1 --- /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 +} -- 2.34.1