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| author | Dan Gohman <gohman@apple.com> | 2009-02-13 00:26:43 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-02-13 00:26:43 +0000 |
| commit | bc511725f08c45984be6ff47d069c3773a2f2eb0 (patch) | |
| tree | 3fe4d37e609073b439fec8149bc69306177c8f95 /test/CodeGen/X86/lsr-sort.ll | |
| parent | b445d740b2b4e30f03fb4991ea7e561fb5d585af (diff) | |
| download | llvm-bc511725f08c45984be6ff47d069c3773a2f2eb0.tar.gz llvm-bc511725f08c45984be6ff47d069c3773a2f2eb0.tar.bz2 llvm-bc511725f08c45984be6ff47d069c3773a2f2eb0.tar.xz | |
Fix LSR's IV sorting function to explicitly sort by bitwidth
after sorting by stride value. This prevents it from missing
IV reuse opportunities in a host-sensitive manner.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64415 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/lsr-sort.ll')
| -rw-r--r-- | test/CodeGen/X86/lsr-sort.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/X86/lsr-sort.ll b/test/CodeGen/X86/lsr-sort.ll new file mode 100644 index 0000000000..00e1d694ef --- /dev/null +++ b/test/CodeGen/X86/lsr-sort.ll @@ -0,0 +1,22 @@ +; RUN: llvm-as < %s | llc -march=x86-64 > %t +; RUN: grep inc %t | count 1 +; RUN: not grep incw %t + +@X = common global i16 0 ; <i16*> [#uses=1] + +define void @foo(i32 %N) nounwind { +entry: + %0 = icmp sgt i32 %N, 0 ; <i1> [#uses=1] + br i1 %0, label %bb, label %return + +bb: ; preds = %bb, %entry + %i.03 = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2] + %1 = trunc i32 %i.03 to i16 ; <i16> [#uses=1] + volatile store i16 %1, i16* @X, align 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 %return, label %bb + +return: ; preds = %bb, %entry + ret void +} |