[ARM][ParallelDSP] Change smlad insertion order
Instead of inserting everything after the 'root' of the reduction,
insert all instructions as close to their operands as possible. This
can help reduce register pressure.
Differential Revision: https://reviews.llvm.org/D67392
llvm-svn: 374981
diff --git a/llvm/test/CodeGen/ARM/ParallelDSP/multi-use-loads.ll b/llvm/test/CodeGen/ARM/ParallelDSP/multi-use-loads.ll
index 37e39a0..6949b4a 100644
--- a/llvm/test/CodeGen/ARM/ParallelDSP/multi-use-loads.ll
+++ b/llvm/test/CodeGen/ARM/ParallelDSP/multi-use-loads.ll
@@ -19,9 +19,9 @@
; CHECK-LE-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-LE-NEXT: ldr lr, [r3, #2]!
; CHECK-LE-NEXT: ldr r4, [r2, #2]!
-; CHECK-LE-NEXT: sxtah r1, r1, lr
; CHECK-LE-NEXT: subs r0, #1
; CHECK-LE-NEXT: smlad r12, r4, lr, r12
+; CHECK-LE-NEXT: sxtah r1, r1, lr
; CHECK-LE-NEXT: bne .LBB0_2
; CHECK-LE-NEXT: @ %bb.3: @ %for.cond.cleanup
; CHECK-LE-NEXT: add.w r0, r12, r1
@@ -210,33 +210,33 @@
define i32 @mul_top_user(i32 %arg, i32* nocapture readnone %arg1, i16* nocapture readonly %arg2, i16* nocapture readonly %arg3) {
; CHECK-LE-LABEL: mul_top_user:
; CHECK-LE: @ %bb.0: @ %entry
-; CHECK-LE-NEXT: .save {r4, r5, r7, lr}
-; CHECK-LE-NEXT: push {r4, r5, r7, lr}
+; CHECK-LE-NEXT: .save {r4, lr}
+; CHECK-LE-NEXT: push {r4, lr}
; CHECK-LE-NEXT: cmp r0, #1
; CHECK-LE-NEXT: blt .LBB2_4
; CHECK-LE-NEXT: @ %bb.1: @ %for.body.preheader
-; CHECK-LE-NEXT: sub.w lr, r2, #2
+; CHECK-LE-NEXT: subs r2, #2
; CHECK-LE-NEXT: subs r3, #2
; CHECK-LE-NEXT: mov.w r12, #0
; CHECK-LE-NEXT: movs r1, #0
; CHECK-LE-NEXT: .p2align 2
; CHECK-LE-NEXT: .LBB2_2: @ %for.body
; CHECK-LE-NEXT: @ =>This Inner Loop Header: Depth=1
-; CHECK-LE-NEXT: ldr r2, [lr, #2]!
-; CHECK-LE-NEXT: ldr r4, [r3, #2]!
-; CHECK-LE-NEXT: asrs r5, r2, #16
-; CHECK-LE-NEXT: smlad r12, r2, r4, r12
+; CHECK-LE-NEXT: ldr lr, [r3, #2]!
+; CHECK-LE-NEXT: ldr r4, [r2, #2]!
; CHECK-LE-NEXT: subs r0, #1
-; CHECK-LE-NEXT: mul r1, r5, r1
+; CHECK-LE-NEXT: smlad r12, r4, lr, r12
+; CHECK-LE-NEXT: asr.w r4, r4, #16
+; CHECK-LE-NEXT: mul r1, r4, r1
; CHECK-LE-NEXT: bne .LBB2_2
; CHECK-LE-NEXT: @ %bb.3: @ %for.cond.cleanup
; CHECK-LE-NEXT: add.w r0, r12, r1
-; CHECK-LE-NEXT: pop {r4, r5, r7, pc}
+; CHECK-LE-NEXT: pop {r4, pc}
; CHECK-LE-NEXT: .LBB2_4:
; CHECK-LE-NEXT: mov.w r12, #0
; CHECK-LE-NEXT: movs r1, #0
; CHECK-LE-NEXT: add.w r0, r12, r1
-; CHECK-LE-NEXT: pop {r4, r5, r7, pc}
+; CHECK-LE-NEXT: pop {r4, pc}
;
; CHECK-BE-LABEL: mul_top_user:
; CHECK-BE: @ %bb.0: @ %entry
@@ -313,8 +313,8 @@
define i32 @and_user(i32 %arg, i32* nocapture readnone %arg1, i16* nocapture readonly %arg2, i16* nocapture readonly %arg3) {
; CHECK-LE-LABEL: and_user:
; CHECK-LE: @ %bb.0: @ %entry
-; CHECK-LE-NEXT: .save {r4, r5, r7, lr}
-; CHECK-LE-NEXT: push {r4, r5, r7, lr}
+; CHECK-LE-NEXT: .save {r4, lr}
+; CHECK-LE-NEXT: push {r4, lr}
; CHECK-LE-NEXT: cmp r0, #1
; CHECK-LE-NEXT: blt .LBB3_4
; CHECK-LE-NEXT: @ %bb.1: @ %for.body.preheader
@@ -327,19 +327,19 @@
; CHECK-LE-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-LE-NEXT: ldr r2, [r3, #2]!
; CHECK-LE-NEXT: ldr r4, [lr, #2]!
-; CHECK-LE-NEXT: uxth r5, r2
-; CHECK-LE-NEXT: smlad r12, r4, r2, r12
; CHECK-LE-NEXT: subs r0, #1
-; CHECK-LE-NEXT: mul r1, r5, r1
+; CHECK-LE-NEXT: smlad r12, r4, r2, r12
+; CHECK-LE-NEXT: uxth r2, r2
+; CHECK-LE-NEXT: mul r1, r2, r1
; CHECK-LE-NEXT: bne .LBB3_2
; CHECK-LE-NEXT: @ %bb.3: @ %for.cond.cleanup
; CHECK-LE-NEXT: add.w r0, r12, r1
-; CHECK-LE-NEXT: pop {r4, r5, r7, pc}
+; CHECK-LE-NEXT: pop {r4, pc}
; CHECK-LE-NEXT: .LBB3_4:
; CHECK-LE-NEXT: mov.w r12, #0
; CHECK-LE-NEXT: movs r1, #0
; CHECK-LE-NEXT: add.w r0, r12, r1
-; CHECK-LE-NEXT: pop {r4, r5, r7, pc}
+; CHECK-LE-NEXT: pop {r4, pc}
;
; CHECK-BE-LABEL: and_user:
; CHECK-BE: @ %bb.0: @ %entry