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