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| author | Dan Gohman <gohman@apple.com> | 2010-01-21 02:09:26 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-01-21 02:09:26 +0000 |
| commit | a10756ee657a4d43a48cca5c166919093930ed6b (patch) | |
| tree | 52a9cf0b867521026963ca127f6a46d19f0f8f78 /test/CodeGen/Thumb2/thumb2-ifcvt1.ll | |
| parent | ac8b4bf66b7263018fe6c133604a30780c24982e (diff) | |
| download | external_llvm-a10756ee657a4d43a48cca5c166919093930ed6b.zip external_llvm-a10756ee657a4d43a48cca5c166919093930ed6b.tar.gz external_llvm-a10756ee657a4d43a48cca5c166919093930ed6b.tar.bz2 | |
Re-implement the main strength-reduction portion of LoopStrengthReduction.
This new version is much more aggressive about doing "full" reduction in
cases where it reduces register pressure, and also more aggressive about
rewriting induction variables to count down (or up) to zero when doing so
reduces register pressure.
It currently uses fairly simplistic algorithms for finding reuse
opportunities, but it introduces a new framework allows it to combine
multiple strategies at once to form hybrid solutions, instead of doing
all full-reduction or all base+index.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Thumb2/thumb2-ifcvt1.ll')
| -rw-r--r-- | test/CodeGen/Thumb2/thumb2-ifcvt1.ll | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/test/CodeGen/Thumb2/thumb2-ifcvt1.ll b/test/CodeGen/Thumb2/thumb2-ifcvt1.ll index 71199ab..1d26756 100644 --- a/test/CodeGen/Thumb2/thumb2-ifcvt1.ll +++ b/test/CodeGen/Thumb2/thumb2-ifcvt1.ll @@ -1,6 +1,6 @@ ; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s -define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) { +define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind { ; CHECK: t1: ; CHECK: it ne ; CHECK: cmpne @@ -20,12 +20,12 @@ cond_next: } ; FIXME: Check for # of unconditional branch after adding branch folding post ifcvt. -define i32 @t2(i32 %a, i32 %b) { +define i32 @t2(i32 %a, i32 %b) nounwind { entry: ; CHECK: t2: -; CHECK: ite le -; CHECK: suble +; CHECK: ite gt ; CHECK: subgt +; CHECK: suble %tmp1434 = icmp eq i32 %a, %b ; <i1> [#uses=1] br i1 %tmp1434, label %bb17, label %bb.outer @@ -60,14 +60,14 @@ bb17: ; preds = %cond_false, %cond_true, %entry @x = external global i32* ; <i32**> [#uses=1] -define void @foo(i32 %a) { +define void @foo(i32 %a) nounwind { entry: %tmp = load i32** @x ; <i32*> [#uses=1] store i32 %a, i32* %tmp ret void } -define void @t3(i32 %a, i32 %b) { +define void @t3(i32 %a, i32 %b) nounwind { entry: ; CHECK: t3: ; CHECK: it lt |