Reapply "Subtract isn't commutative, fix this for MMX psub." with

a somewhat randomly chosen cpu that will minimize cpu specific
differences on bots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181814 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 213 insertions, 0 deletions

diff --git a/test/CodeGen/X86/x86-64-psub.ll b/test/CodeGen/X86/x86-64-psub.ll
new file mode 100644
index 0000000000..7869a80b2a
--- /dev/null
+++ b/test/CodeGen/X86/x86-64-psub.ll
@@ -0,0 +1,213 @@
+; RUN: llc -mtriple=x86_64-pc-linux -mcpu=corei7 < %s | FileCheck %s
+
+; MMX packed sub opcodes were wrongly marked as commutative.
+; This test checks that the operands of packed sub instructions are
+; never interchanged by the "Two-Address instruction pass".
+
+declare { i64, double } @getFirstParam() 
+declare { i64, double } @getSecondParam() 
+
+define i64 @test_psubb() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <8 x i8>
+  %3 = bitcast <8 x i8> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <8 x i8>
+  %5 = bitcast <8 x i8> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psub.b(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <8 x i8>
+  %8 = bitcast <8 x i8> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubb:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubb [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+define i64 @test_psubw() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <4 x i16>
+  %3 = bitcast <4 x i16> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <4 x i16>
+  %5 = bitcast <4 x i16> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psub.w(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <4 x i16>
+  %8 = bitcast <4 x i16> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubw:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubw [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+
+define i64 @test_psubd() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <2 x i32>
+  %3 = bitcast <2 x i32> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <2 x i32>
+  %5 = bitcast <2 x i32> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psub.d(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <2 x i32>
+  %8 = bitcast <2 x i32> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubd:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubd [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+define i64 @test_psubsb() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <8 x i8>
+  %3 = bitcast <8 x i8> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <8 x i8>
+  %5 = bitcast <8 x i8> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psubs.b(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <8 x i8>
+  %8 = bitcast <8 x i8> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubsb:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubsb [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+define i64 @test_psubswv() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <4 x i16>
+  %3 = bitcast <4 x i16> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <4 x i16>
+  %5 = bitcast <4 x i16> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psubs.w(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <4 x i16>
+  %8 = bitcast <4 x i16> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubswv:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubsw [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+define i64 @test_psubusbv() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <8 x i8>
+  %3 = bitcast <8 x i8> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <8 x i8>
+  %5 = bitcast <8 x i8> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psubus.b(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <8 x i8>
+  %8 = bitcast <8 x i8> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubusbv:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubusb [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+define i64 @test_psubuswv() {
+entry:
+  %call = tail call { i64, double } @getFirstParam()
+  %0 = extractvalue { i64, double } %call, 0
+  %call2 = tail call { i64, double } @getSecondParam()
+  %1 = extractvalue { i64, double } %call2, 0
+  %__m1.0.insert.i = insertelement <1 x i64> undef, i64 %0, i32 0
+  %__m2.0.insert.i = insertelement <1 x i64> undef, i64 %1, i32 0
+  %2 = bitcast <1 x i64> %__m1.0.insert.i to <4 x i16>
+  %3 = bitcast <4 x i16> %2 to x86_mmx
+  %4 = bitcast <1 x i64> %__m2.0.insert.i to <4 x i16>
+  %5 = bitcast <4 x i16> %4 to x86_mmx
+  %6 = tail call x86_mmx @llvm.x86.mmx.psubus.w(x86_mmx %3, x86_mmx %5) nounwind
+  %7 = bitcast x86_mmx %6 to <4 x i16>
+  %8 = bitcast <4 x i16> %7 to <1 x i64>
+  %retval.0.extract.i15 = extractelement <1 x i64> %8, i32 0
+  ret i64 %retval.0.extract.i15
+}
+
+; CHECK: test_psubuswv:
+; CHECK:   callq getFirstParam
+; CHECK:   callq getSecondParam
+; CHECK:   movd %rax, [[PARAM2:%[a-z0-9]+]]
+; CHECK:   movq (%rsp), [[PARAM1:%[a-z0-9]+]]
+; CHECK:   psubusw [[PARAM2]], [[PARAM1]]
+; CHECK: ret
+
+
+declare x86_mmx @llvm.x86.mmx.psubus.w(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psubus.b(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psubs.w(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psubs.b(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psub.d(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psub.w(x86_mmx, x86_mmx) nounwind readnone
+
+declare x86_mmx @llvm.x86.mmx.psub.b(x86_mmx, x86_mmx) nounwind readnone