[llvm-commits] [llvm] r106886 - in /llvm/trunk: lib/Target/X86/X86InstrSSE.td test/CodeGen/X86/sse-commute.ll

[Dan Gohman]

Author: djg
Date: Fri Jun 25 16:05:35 2010
New Revision: 106886

URL: http://llvm.org/viewvc/llvm-project?rev=106886&view=rev
Log:
pcmpeqd and friends are Commutable.

Added:
    llvm/trunk/test/CodeGen/X86/sse-commute.ll
Modified:
    llvm/trunk/lib/Target/X86/X86InstrSSE.td

Modified: llvm/trunk/lib/Target/X86/X86InstrSSE.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrSSE.td?rev=106886&r1=106885&r2=106886&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrSSE.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrSSE.td Fri Jun 25 16:05:35 2010
@@ -2060,9 +2060,9 @@
 }
 
 // SSE2 Integer comparison
-defm PCMPEQB  : PDI_binop_rm_int<0x74, "pcmpeqb", int_x86_sse2_pcmpeq_b>;
-defm PCMPEQW  : PDI_binop_rm_int<0x75, "pcmpeqw", int_x86_sse2_pcmpeq_w>;
-defm PCMPEQD  : PDI_binop_rm_int<0x76, "pcmpeqd", int_x86_sse2_pcmpeq_d>;
+defm PCMPEQB  : PDI_binop_rm_int<0x74, "pcmpeqb", int_x86_sse2_pcmpeq_b, 1>;
+defm PCMPEQW  : PDI_binop_rm_int<0x75, "pcmpeqw", int_x86_sse2_pcmpeq_w, 1>;
+defm PCMPEQD  : PDI_binop_rm_int<0x76, "pcmpeqd", int_x86_sse2_pcmpeq_d, 1>;
 defm PCMPGTB  : PDI_binop_rm_int<0x64, "pcmpgtb", int_x86_sse2_pcmpgt_b>;
 defm PCMPGTW  : PDI_binop_rm_int<0x65, "pcmpgtw", int_x86_sse2_pcmpgt_w>;
 defm PCMPGTD  : PDI_binop_rm_int<0x66, "pcmpgtd", int_x86_sse2_pcmpgt_d>;

Added: llvm/trunk/test/CodeGen/X86/sse-commute.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/sse-commute.ll?rev=106886&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/sse-commute.ll (added)
+++ llvm/trunk/test/CodeGen/X86/sse-commute.ll Fri Jun 25 16:05:35 2010
@@ -0,0 +1,20 @@
+; RUN: llc -march=x86-64 < %s | FileCheck %s
+
+; Commute the comparison to avoid a move.
+; PR7500.
+
+; CHECK: a:
+; CHECK-NOT: mov
+; CHECK:     pcmpeqd
+define <2 x double> @a(<2 x double>, <2 x double>) nounwind readnone {
+entry:
+  %tmp6 = bitcast <2 x double> %0 to <4 x i32>    ; <<4 x i32>> [#uses=2]
+  %tmp4 = bitcast <2 x double> %1 to <4 x i32>    ; <<4 x i32>> [#uses=1]
+  %cmp = icmp eq <4 x i32> %tmp6, %tmp4           ; <<4 x i1>> [#uses=1]
+  %sext = sext <4 x i1> %cmp to <4 x i32>         ; <<4 x i32>> [#uses=1]
+  %and = and <4 x i32> %tmp6, %sext               ; <<4 x i32>> [#uses=1]
+  %tmp8 = bitcast <4 x i32> %and to <2 x double>  ; <<2 x double>> [#uses=1]
+  ret <2 x double> %tmp8
+}
+
+