| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s | FileCheck %s |
| |
| target datalayout = "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32" |
| target triple = "thumbv7m--linux-gnu" |
| |
| ; NOTE: When optimising for minimum size, an LDM is expected to be generated |
| define void @f(i32 %n, i32* nocapture %a, i32* nocapture readonly %b) optsize minsize { |
| ; CHECK-LABEL: f: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: cmp r0, #1 |
| ; CHECK-NEXT: blt .LBB0_2 |
| ; CHECK-NEXT: .LBB0_1: @ %.lr.ph |
| ; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1 |
| ; CHECK-NEXT: ldm r2!, {r3} |
| ; CHECK-NEXT: adds r3, #3 |
| ; CHECK-NEXT: stm r1!, {r3} |
| ; CHECK-NEXT: subs r0, #1 |
| ; CHECK-NEXT: bne .LBB0_1 |
| ; CHECK-NEXT: .LBB0_2: @ %._crit_edge |
| ; CHECK-NEXT: bx lr |
| %1 = icmp sgt i32 %n, 0 |
| br i1 %1, label %.lr.ph, label %._crit_edge |
| |
| .lr.ph: ; preds = %.lr.ph, %0 |
| %i.04 = phi i32 [ %6, %.lr.ph ], [ 0, %0 ] |
| %.03 = phi i32* [ %2, %.lr.ph ], [ %b, %0 ] |
| %.012 = phi i32* [ %5, %.lr.ph ], [ %a, %0 ] |
| %2 = getelementptr inbounds i32, i32* %.03, i32 1 |
| %3 = load i32, i32* %.03, align 4 |
| %4 = add nsw i32 %3, 3 |
| %5 = getelementptr inbounds i32, i32* %.012, i32 1 |
| store i32 %4, i32* %.012, align 4 |
| %6 = add nsw i32 %i.04, 1 |
| %exitcond = icmp eq i32 %6, %n |
| br i1 %exitcond, label %._crit_edge, label %.lr.ph |
| |
| ._crit_edge: ; preds = %.lr.ph, %0 |
| ret void |
| } |
| |
| ; NOTE: When not optimising for minimum size, an LDM is expected not to be generated |
| define void @f_nominsize(i32 %n, i32* nocapture %a, i32* nocapture readonly %b) optsize { |
| ; CHECK-LABEL: f_nominsize: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: cmp r0, #1 |
| ; CHECK-NEXT: it lt |
| ; CHECK-NEXT: bxlt lr |
| ; CHECK-NEXT: .LBB1_1: @ %.lr.ph |
| ; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1 |
| ; CHECK-NEXT: ldr r3, [r2], #4 |
| ; CHECK-NEXT: subs r0, #1 |
| ; CHECK-NEXT: add.w r3, r3, #3 |
| ; CHECK-NEXT: str r3, [r1], #4 |
| ; CHECK-NEXT: bne .LBB1_1 |
| ; CHECK-NEXT: @ %bb.2: @ %._crit_edge |
| ; CHECK-NEXT: bx lr |
| %1 = icmp sgt i32 %n, 0 |
| br i1 %1, label %.lr.ph, label %._crit_edge |
| |
| .lr.ph: ; preds = %.lr.ph, %0 |
| %i.04 = phi i32 [ %6, %.lr.ph ], [ 0, %0 ] |
| %.03 = phi i32* [ %2, %.lr.ph ], [ %b, %0 ] |
| %.012 = phi i32* [ %5, %.lr.ph ], [ %a, %0 ] |
| %2 = getelementptr inbounds i32, i32* %.03, i32 1 |
| %3 = load i32, i32* %.03, align 4 |
| %4 = add nsw i32 %3, 3 |
| %5 = getelementptr inbounds i32, i32* %.012, i32 1 |
| store i32 %4, i32* %.012, align 4 |
| %6 = add nsw i32 %i.04, 1 |
| %exitcond = icmp eq i32 %6, %n |
| br i1 %exitcond, label %._crit_edge, label %.lr.ph |
| |
| ._crit_edge: ; preds = %.lr.ph, %0 |
| ret void |
| } |