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| author | Chris Lattner <sabre@nondot.org> | 2010-01-01 22:42:29 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-01-01 22:42:29 +0000 |
| commit | 85c1c964dc5b73085f2b2dce1cfc171fa9b765e2 (patch) | |
| tree | c4335ee741506654a5e7d0dcc8148f8d7402930f /test/Transforms | |
| parent | f2ebc682d1ee008782d44261f28e92bf982790c2 (diff) | |
| download | external_llvm-85c1c964dc5b73085f2b2dce1cfc171fa9b765e2.zip external_llvm-85c1c964dc5b73085f2b2dce1cfc171fa9b765e2.tar.gz external_llvm-85c1c964dc5b73085f2b2dce1cfc171fa9b765e2.tar.bz2 | |
generalize the pointer difference optimization to handle
a constantexpr gep on the 'base' side of the expression.
This completes comment #4 in PR3351, which comes from
483.xalancbmk.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92402 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstCombine/sub.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/sub.ll b/test/Transforms/InstCombine/sub.ll index 85ee64e..f8f7c44 100644 --- a/test/Transforms/InstCombine/sub.ll +++ b/test/Transforms/InstCombine/sub.ll @@ -260,3 +260,16 @@ define i64 @test24b(i8* %P, i64 %A){ ; CHECK-NEXT: ret i64 } + +define i64 @test25(i8* %P, i64 %A){ + %B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A + %C = ptrtoint i16* %B to i64 + %G = sub i64 %C, ptrtoint (i16* getelementptr ([42 x i16]* @Arr, i64 1, i64 0) to i64) + ret i64 %G +; CHECK: @test25 +; CHECK-NEXT: shl i64 %A, 1 +; CHECK-NEXT: add i64 {{.*}}, -84 +; CHECK-NEXT: ret i64 +} + + |