[ARM] Extra qdadd patterns

This adds some new qdadd patterns to go along with the other recently added
qadd's.

Differential Revision: https://reviews.llvm.org/D68999

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375414 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 43c337220768605c0604a94811616ae4321656c3..fe696222ec70a1146a96f099779bab7d39de5512 100644 (file)
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -3759,6 +3759,10 @@ def : ARMV5TEPat<(saddsat GPR:$a, GPR:$b),
                  (QADD GPR:$a, GPR:$b)>;
 def : ARMV5TEPat<(ssubsat GPR:$a, GPR:$b),
                  (QSUB GPR:$a, GPR:$b)>;
+def : ARMV5TEPat<(saddsat(saddsat rGPR:$Rm, rGPR:$Rm), rGPR:$Rn),
+                 (QDADD rGPR:$Rm, rGPR:$Rn)>;
+def : ARMV5TEPat<(ssubsat rGPR:$Rm, (saddsat rGPR:$Rn, rGPR:$Rn)),
+                 (QDSUB rGPR:$Rm, rGPR:$Rn)>;
 def : ARMV6Pat<(ARMqadd8b rGPR:$Rm, rGPR:$Rn),
                (QADD8 rGPR:$Rm, rGPR:$Rn)>;
 def : ARMV6Pat<(ARMqsub8b rGPR:$Rm, rGPR:$Rn),

diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 7d265419d798809c1c13531cb875981efc56fadf..25a45b39fa0c0b896383eed07ef065ec92a85b39 100644 (file)
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -2399,6 +2399,10 @@ def : Thumb2DSPPat<(saddsat rGPR:$Rm, rGPR:$Rn),
                    (t2QADD rGPR:$Rm, rGPR:$Rn)>;
 def : Thumb2DSPPat<(ssubsat rGPR:$Rm, rGPR:$Rn),
                    (t2QSUB rGPR:$Rm, rGPR:$Rn)>;
+def : Thumb2DSPPat<(saddsat(saddsat rGPR:$Rm, rGPR:$Rm), rGPR:$Rn),
+                   (t2QDADD rGPR:$Rm, rGPR:$Rn)>;
+def : Thumb2DSPPat<(ssubsat rGPR:$Rm, (saddsat rGPR:$Rn, rGPR:$Rn)),
+                   (t2QDSUB rGPR:$Rm, rGPR:$Rn)>;
 def : Thumb2DSPPat<(ARMqadd8b rGPR:$Rm, rGPR:$Rn),
                    (t2QADD8 rGPR:$Rm, rGPR:$Rn)>;
 def : Thumb2DSPPat<(ARMqsub8b rGPR:$Rm, rGPR:$Rn),

diff --git a/test/CodeGen/ARM/qdadd.ll b/test/CodeGen/ARM/qdadd.ll
index 4973110f9ee7b51afecd9c01389de891e2e15069..94442ca93afad1ba638d20fdd9c185dc38ba2f26 100644 (file)
--- a/test/CodeGen/ARM/qdadd.ll
+++ b/test/CodeGen/ARM/qdadd.ll
@@ -36,14 +36,12 @@ define i32 @qdadd(i32 %x, i32 %y) nounwind {
 ;
 ; CHECK-T2DSP-LABEL: qdadd:
 ; CHECK-T2DSP:       @ %bb.0:
-; CHECK-T2DSP-NEXT:    qadd r0, r0, r0
-; CHECK-T2DSP-NEXT:    qadd r0, r0, r1
+; CHECK-T2DSP-NEXT:    qdadd r0, r0, r1
 ; CHECK-T2DSP-NEXT:    bx lr
 ;
 ; CHECK-ARM-LABEL: qdadd:
 ; CHECK-ARM:       @ %bb.0:
-; CHECK-ARM-NEXT:    qadd r0, r0, r0
-; CHECK-ARM-NEXT:    qadd r0, r0, r1
+; CHECK-ARM-NEXT:    qdadd r0, r0, r1
 ; CHECK-ARM-NEXT:    bx lr
   %z = call i32 @llvm.sadd.sat.i32(i32 %x, i32 %x)
   %tmp = call i32 @llvm.sadd.sat.i32(i32 %z, i32 %y)
@@ -82,14 +80,12 @@ define i32 @qdadd_c(i32 %x, i32 %y) nounwind {
 ;
 ; CHECK-T2DSP-LABEL: qdadd_c:
 ; CHECK-T2DSP:       @ %bb.0:
-; CHECK-T2DSP-NEXT:    qadd r0, r0, r0
-; CHECK-T2DSP-NEXT:    qadd r0, r1, r0
+; CHECK-T2DSP-NEXT:    qdadd r0, r0, r1
 ; CHECK-T2DSP-NEXT:    bx lr
 ;
 ; CHECK-ARM-LABEL: qdadd_c:
 ; CHECK-ARM:       @ %bb.0:
-; CHECK-ARM-NEXT:    qadd r0, r0, r0
-; CHECK-ARM-NEXT:    qadd r0, r1, r0
+; CHECK-ARM-NEXT:    qdadd r0, r0, r1
 ; CHECK-ARM-NEXT:    bx lr
   %z = call i32 @llvm.sadd.sat.i32(i32 %x, i32 %x)
   %tmp = call i32 @llvm.sadd.sat.i32(i32 %y, i32 %z)
@@ -128,14 +124,12 @@ define i32 @qdsub(i32 %x, i32 %y) nounwind {
 ;
 ; CHECK-T2DSP-LABEL: qdsub:
 ; CHECK-T2DSP:       @ %bb.0:
-; CHECK-T2DSP-NEXT:    qadd r0, r0, r0
-; CHECK-T2DSP-NEXT:    qsub r0, r1, r0
+; CHECK-T2DSP-NEXT:    qdsub r0, r1, r0
 ; CHECK-T2DSP-NEXT:    bx lr
 ;
 ; CHECK-ARM-LABEL: qdsub:
 ; CHECK-ARM:       @ %bb.0:
-; CHECK-ARM-NEXT:    qadd r0, r0, r0
-; CHECK-ARM-NEXT:    qsub r0, r1, r0
+; CHECK-ARM-NEXT:    qdsub r0, r1, r0
 ; CHECK-ARM-NEXT:    bx lr
   %z = call i32 @llvm.sadd.sat.i32(i32 %x, i32 %x)
   %tmp = call i32 @llvm.ssub.sat.i32(i32 %y, i32 %z)