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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-01-14 13:47:07 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-01-14 13:47:07 +0000 |
| commit | a367285f64be4fe27e5330666c40921f9b2f7fd3 (patch) | |
| tree | dcf7cda953a4371963cc124a918c9245c647a0e3 /llvm/test/CodeGen/X86/combine-add-ssat.ll | |
| parent | b4c1e4c2fb035ea49974cfd7c0ef2497502e18be (diff) | |
| download | bcm5719-llvm-a367285f64be4fe27e5330666c40921f9b2f7fd3.tar.gz bcm5719-llvm-a367285f64be4fe27e5330666c40921f9b2f7fd3.zip | |
[X86] Add add/sub saturation undef tests.
llvm-svn: 351066
Diffstat (limited to 'llvm/test/CodeGen/X86/combine-add-ssat.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/combine-add-ssat.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/combine-add-ssat.ll b/llvm/test/CodeGen/X86/combine-add-ssat.ll index 74b43180fde..bd06ae9de64 100644 --- a/llvm/test/CodeGen/X86/combine-add-ssat.ll +++ b/llvm/test/CodeGen/X86/combine-add-ssat.ll @@ -11,6 +11,36 @@ declare i32 @llvm.sadd.sat.i32 (i32, i32) declare i64 @llvm.sadd.sat.i64 (i64, i64) declare <8 x i16> @llvm.sadd.sat.v8i16(<8 x i16>, <8 x i16>) +; fold (sadd_sat x, undef) -> -1 +define i32 @combine_undef_i32(i32 %a0) { +; CHECK-LABEL: combine_undef_i32: +; CHECK: # %bb.0: +; CHECK-NEXT: xorl %eax, %eax +; CHECK-NEXT: movl %edi, %ecx +; CHECK-NEXT: addl %eax, %ecx +; CHECK-NEXT: setns %al +; CHECK-NEXT: addl $2147483647, %eax # imm = 0x7FFFFFFF +; CHECK-NEXT: addl %eax, %edi +; CHECK-NEXT: cmovnol %edi, %eax +; CHECK-NEXT: retq + %res = call i32 @llvm.sadd.sat.i32(i32 %a0, i32 undef) + ret i32 %res +} + +define <8 x i16> @combine_undef_v8i16(<8 x i16> %a0) { +; SSE-LABEL: combine_undef_v8i16: +; SSE: # %bb.0: +; SSE-NEXT: paddsw %xmm0, %xmm0 +; SSE-NEXT: retq +; +; AVX-LABEL: combine_undef_v8i16: +; AVX: # %bb.0: +; AVX-NEXT: vpaddsw %xmm0, %xmm0, %xmm0 +; AVX-NEXT: retq + %res = call <8 x i16> @llvm.sadd.sat.v8i16(<8 x i16> undef, <8 x i16> %a0) + ret <8 x i16> %res +} + ; fold (sadd_sat c1, c2) -> c3 define i32 @combine_constfold_i32() { ; CHECK-LABEL: combine_constfold_i32: |
