diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2009-09-21 21:12:25 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-09-21 21:12:25 +0000 |
| commit | cf985a95454c935d8662ef5200c79ca0553b3da7 (patch) | |
| tree | f4f53dc8ca5f5a48dd109856d3c1dc631228efcb /test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll | |
| parent | b2bb7db9e242c54a4a84448ab503015a148e9286 (diff) | |
| download | llvm-cf985a95454c935d8662ef5200c79ca0553b3da7.tar.gz llvm-cf985a95454c935d8662ef5200c79ca0553b3da7.tar.bz2 llvm-cf985a95454c935d8662ef5200c79ca0553b3da7.tar.xz | |
Clean up spill weight computation. Also some changes to give loop induction
variable increment / decrement slighter high priority.
This has major impact on some micro-benchmarks. On MultiSource/Applications
and spec tests, it's a minor win. It also reduce 256.bzip instruction count
by 8%, 55 on 164.gzip on i386 / Darwin.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82485 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll')
| -rw-r--r-- | test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll b/test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll new file mode 100644 index 0000000000..80b883582c --- /dev/null +++ b/test/CodeGen/X86/2009-09-21-NoSpillLoopCount.ll @@ -0,0 +1,36 @@ +; RUN: llc < %s -mtriple=i386-apple-darwin10.0 -relocation-model=pic | FileCheck %s + +define void @dot(i16* nocapture %A, i32 %As, i16* nocapture %B, i32 %Bs, i16* nocapture %C, i32 %N) nounwind ssp { +; CHECK: dot: +; CHECK: decl % +; CHECK-NEXT: jne +entry: + %0 = icmp sgt i32 %N, 0 ; <i1> [#uses=1] + br i1 %0, label %bb, label %bb2 + +bb: ; preds = %bb, %entry + %i.03 = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=3] + %sum.04 = phi i32 [ 0, %entry ], [ %10, %bb ] ; <i32> [#uses=1] + %1 = mul i32 %i.03, %As ; <i32> [#uses=1] + %2 = getelementptr i16* %A, i32 %1 ; <i16*> [#uses=1] + %3 = load i16* %2, align 2 ; <i16> [#uses=1] + %4 = sext i16 %3 to i32 ; <i32> [#uses=1] + %5 = mul i32 %i.03, %Bs ; <i32> [#uses=1] + %6 = getelementptr i16* %B, i32 %5 ; <i16*> [#uses=1] + %7 = load i16* %6, align 2 ; <i16> [#uses=1] + %8 = sext i16 %7 to i32 ; <i32> [#uses=1] + %9 = mul i32 %8, %4 ; <i32> [#uses=1] + %10 = add i32 %9, %sum.04 ; <i32> [#uses=2] + %indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2] + %exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1] + br i1 %exitcond, label %bb1.bb2_crit_edge, label %bb + +bb1.bb2_crit_edge: ; preds = %bb + %phitmp = trunc i32 %10 to i16 ; <i16> [#uses=1] + br label %bb2 + +bb2: ; preds = %entry, %bb1.bb2_crit_edge + %sum.0.lcssa = phi i16 [ %phitmp, %bb1.bb2_crit_edge ], [ 0, %entry ] ; <i16> [#uses=1] + store i16 %sum.0.lcssa, i16* %C, align 2 + ret void +} |