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| author | Chris Lattner <sabre@nondot.org> | 2009-02-17 20:47:23 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-02-17 20:47:23 +0000 |
| commit | a84f47c3e7bd1ba161ca46b64bd2469d49593320 (patch) | |
| tree | 0c415987b9f976d0bf4685e89ffe9353acbdd486 /test/Transforms/InstCombine | |
| parent | 189c6357a1a1d09b8b0c5cf6f1cd561a47ccec18 (diff) | |
commit a tweaked version of Daniel's patch for PR3599. We now
eliminate all the extensions and all but the one required truncate
from the testcase, but the or/and/shift stuff still isn't zapped.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64809 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine')
| -rw-r--r-- | test/Transforms/InstCombine/zext.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/zext.ll b/test/Transforms/InstCombine/zext.ll index ceb8deb677..c0fa3771cc 100644 --- a/test/Transforms/InstCombine/zext.ll +++ b/test/Transforms/InstCombine/zext.ll @@ -8,3 +8,26 @@ define i64 @test_sext_zext(i16 %A) { ret i64 %c2 } +; PR3599 +define i32 @test2(i64 %tmp) nounwind readnone { +entry: + %tmp5 = trunc i64 %tmp to i8 ; <i8> [#uses=1] + %tmp7 = lshr i64 %tmp, 8 ; <i64> [#uses=1] + %tmp8 = trunc i64 %tmp7 to i8 ; <i8> [#uses=1] + %tmp10 = lshr i64 %tmp, 16 ; <i64> [#uses=1] + %tmp11 = trunc i64 %tmp10 to i8 ; <i8> [#uses=1] + %tmp13 = lshr i64 %tmp, 24 ; <i64> [#uses=1] + %tmp14 = trunc i64 %tmp13 to i8 ; <i8> [#uses=1] + %tmp1 = zext i8 %tmp5 to i32 ; <i32> [#uses=1] + %tmp2 = zext i8 %tmp8 to i32 ; <i32> [#uses=1] + %tmp3 = shl i32 %tmp2, 8 ; <i32> [#uses=1] + %tmp4 = zext i8 %tmp11 to i32 ; <i32> [#uses=1] + %tmp6 = shl i32 %tmp4, 16 ; <i32> [#uses=1] + %tmp9 = zext i8 %tmp14 to i32 ; <i32> [#uses=1] + %tmp12 = shl i32 %tmp9, 24 ; <i32> [#uses=1] + %tmp15 = or i32 %tmp12, %tmp1 ; <i32> [#uses=1] + %tmp16 = or i32 %tmp15, %tmp6 ; <i32> [#uses=1] + %tmp17 = or i32 %tmp16, %tmp3 ; <i32> [#uses=1] + ret i32 %tmp17 +} + |