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author | Chris Lattner <sabre@nondot.org> | 2009-01-31 07:04:22 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2009-01-31 07:04:22 +0000 |
commit | 1e19d603e08fb5ceef8096f3833d53adc339744f (patch) | |
tree | a23aaa11b0a126ca08f69c5404be5e9cfe939646 /test/Transforms/InstCombine/dce-iterate.ll | |
parent | 95be699a9aaa04abc01b71534d3a4633c228d091 (diff) | |
download | llvm-1e19d603e08fb5ceef8096f3833d53adc339744f.tar.gz llvm-1e19d603e08fb5ceef8096f3833d53adc339744f.tar.bz2 llvm-1e19d603e08fb5ceef8096f3833d53adc339744f.tar.xz |
make sure to set Changed=true when instcombine hacks on the code,
not doing so prevents it from properly iterating and prevents it
from deleting the entire body of dce-iterate.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63476 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/dce-iterate.ll')
-rw-r--r-- | test/Transforms/InstCombine/dce-iterate.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/dce-iterate.ll b/test/Transforms/InstCombine/dce-iterate.ll new file mode 100644 index 0000000000..e222970df6 --- /dev/null +++ b/test/Transforms/InstCombine/dce-iterate.ll @@ -0,0 +1,24 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret double .sy} + +define internal double @ScaleObjectAdd(double %sx, double %sy, double %sz) nounwind { +entry: + %sx34 = bitcast double %sx to i64 ; <i64> [#uses=1] + %sx3435 = zext i64 %sx34 to i960 ; <i960> [#uses=1] + %sy22 = bitcast double %sy to i64 ; <i64> [#uses=1] + %sy2223 = zext i64 %sy22 to i960 ; <i960> [#uses=1] + %sy222324 = shl i960 %sy2223, 320 ; <i960> [#uses=1] + %sy222324.ins = or i960 %sx3435, %sy222324 ; <i960> [#uses=1] + %sz10 = bitcast double %sz to i64 ; <i64> [#uses=1] + %sz1011 = zext i64 %sz10 to i960 ; <i960> [#uses=1] + %sz101112 = shl i960 %sz1011, 640 ; <i960> [#uses=1] + %sz101112.ins = or i960 %sy222324.ins, %sz101112 + + %a = trunc i960 %sz101112.ins to i64 ; <i64> [#uses=1] + %b = bitcast i64 %a to double ; <double> [#uses=1] + %c = lshr i960 %sz101112.ins, 320 ; <i960> [#uses=1] + %d = trunc i960 %c to i64 ; <i64> [#uses=1] + %e = bitcast i64 %d to double ; <double> [#uses=1] + %f = add double %b, %e + + ret double %e +} |