derek.holloway
7502bf64a4
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42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=thumbv6-linux-gnueabi < %s | FileCheck %s
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; After various DAGCombine optimizations, we end up with an sbcs with
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; multiple uses of the cpsr def, and we therefore clone the subs/sbcs.
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; Make sure this doesn't crash.
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;
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; The output here might change at some point in the future, and no
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; longer clone the operations; if that happens, there probably isn't any
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; straightforward way to fix the test.
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define i64 @f(i64 %x2, i32 %z) {
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; CHECK-LABEL: f:
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; CHECK: @ %bb.0:
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; CHECK-NEXT: .save {r4, r5, r7, lr}
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; CHECK-NEXT: push {r4, r5, r7, lr}
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; CHECK-NEXT: movs r2, #0
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; CHECK-NEXT: subs r3, r0, #1
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; CHECK-NEXT: mov r3, r1
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; CHECK-NEXT: sbcs r3, r2
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; CHECK-NEXT: mov r3, r2
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; CHECK-NEXT: adcs r3, r2
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; CHECK-NEXT: movs r4, #30
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; CHECK-NEXT: subs r5, r0, #1
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; CHECK-NEXT: mov r5, r1
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; CHECK-NEXT: sbcs r5, r2
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; CHECK-NEXT: adcs r4, r2
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; CHECK-NEXT: lsls r2, r1, #1
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; CHECK-NEXT: lsls r2, r4
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; CHECK-NEXT: movs r4, #1
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; CHECK-NEXT: eors r4, r3
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; CHECK-NEXT: lsrs r0, r4
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; CHECK-NEXT: orrs r0, r2
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; CHECK-NEXT: lsrs r1, r4
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; CHECK-NEXT: pop {r4, r5, r7, pc}
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%x3 = add nsw i64 %x2, -1
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%x8 = icmp ne i64 %x2, 0
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%x9 = xor i1 %x8, true
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%x10 = zext i1 %x9 to i64
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%x11 = lshr i64 %x2, %x10
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ret i64 %x11
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}
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