[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 43c3372..fe69622 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -3759,6 +3759,10 @@
(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 7d26541..25a45b3 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -2399,6 +2399,10 @@
(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 4973110..94442ca 100644
--- a/test/CodeGen/ARM/qdadd.ll
+++ b/test/CodeGen/ARM/qdadd.ll
@@ -36,14 +36,12 @@
;
; 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 @@
;
; 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 @@
;
; 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)
