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| author | Michael Liao <michael.liao@intel.com> | 2012-10-16 19:38:35 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-10-16 19:38:35 +0000 |
| commit | 272ea0323999890d8bcf75b873a1c8ab2cdcba0d (patch) | |
| tree | 9c360ccd3e6ec121f64e3be30ed53b9128f96e95 /test | |
| parent | 6f7cccd2e28bf544609ee8fdbfac4a24e9f37ff6 (diff) | |
| download | llvm-272ea0323999890d8bcf75b873a1c8ab2cdcba0d.tar.gz llvm-272ea0323999890d8bcf75b873a1c8ab2cdcba0d.tar.bz2 llvm-272ea0323999890d8bcf75b873a1c8ab2cdcba0d.tar.xz | |
Teach DAG combine to fold (trunc (fptoXi x)) to (fptoXi x)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166049 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/trunc-fp2int.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/X86/trunc-fp2int.ll b/test/CodeGen/X86/trunc-fp2int.ll new file mode 100644 index 0000000000..792af16c95 --- /dev/null +++ b/test/CodeGen/X86/trunc-fp2int.ll @@ -0,0 +1,18 @@ +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=corei7 | FileCheck %s + +define <4 x i8> @bar(<4 x float> %in) nounwind readnone alwaysinline { + %1 = fptoui <4 x float> %in to <4 x i8> + ret <4 x i8> %1 +; CHECK: bar +; CHECK: cvttps2dq +} +define <4 x i8> @foo(<4 x float> %in) nounwind readnone alwaysinline { + %1 = fptoui <4 x float> %in to <4 x i32> + %2 = trunc <4 x i32> %1 to <4 x i16> + %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> + %4 = trunc <8 x i16> %3 to <8 x i8> + %5 = shufflevector <8 x i8> %4, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> + ret <4 x i8> %5 +; CHECK: foo +; CHECK: cvttps2dq +} |