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44 lines
1.4 KiB
44 lines
1.4 KiB
4 months ago
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; RUN: llc -O2 -mtriple arm < %s | FileCheck %s
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; Function Attrs: norecurse nounwind readnone
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define i32 @foo(i32 %vreg0, i32 %vreg1, i32 %vreg2, i32 %vreg3, i32 %vreg4) local_unnamed_addr {
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entry:
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%conv = zext i32 %vreg2 to i64
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%conv1 = zext i32 %vreg0 to i64
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%add2 = add nuw nsw i64 %conv, %conv1
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%shr = lshr i64 %add2, 32
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%conv4 = trunc i64 %shr to i32
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%conv5 = and i64 %add2, 4294967295
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%add8 = add nuw nsw i64 %conv5, %conv1
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%shr9 = lshr i64 %add8, 32
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%conv10 = trunc i64 %shr9 to i32
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%add11 = add nuw nsw i32 %conv10, %conv4
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%conv12 = zext i32 %vreg3 to i64
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%conv14 = zext i32 %vreg1 to i64
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%add15 = add nuw nsw i64 %conv12, %conv14
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%shr16 = lshr i64 %add15, 32
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%conv19 = zext i32 %vreg4 to i64
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%add20 = add nuw nsw i64 %shr16, %conv19
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%shr22 = lshr i64 %add20, 32
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%conv23 = trunc i64 %shr22 to i32
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%add24 = add nuw nsw i32 %add11, %conv23
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ret i32 %add24
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; CHECK: push {r11, lr}
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; CHECK-NEXT: adds r2, r2, r0
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; CHECK-NEXT: mov r12, #0
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; CHECK-NEXT: adc lr, r12, #0
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; CHECK-NEXT: adds r0, r2, r0
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; CHECK-NEXT: ldr r2, [sp, #8]
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; CHECK-NEXT: adc r0, r12, #0
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; CHECK-NEXT: adds r1, r3, r1
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; The interesting bit is the next instruction which looks
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; like is computing a dead r1 but is actually computing a carry
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; for the final adc.
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; CHECK-NEXT: adcs r1, r2, #0
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; CHECK-NEXT: adc r0, r0, lr
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; CHECK-NEXT: pop {r11, lr}
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; CHECK-NEXT: mov pc, lr
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}
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