78 lines
2.0 KiB
LLVM
78 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; RUN: llc -mtriple=arm-eabi -mattr=+v4t %s -o - | FileCheck %s
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;; Integer absolute value, should produce something as good as: ARM:
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;; movs r0, r0
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;; rsbmi r0, r0, #0
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;; bx lr
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define i32 @test(i32 %a) {
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; CHECK-LABEL: test:
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; CHECK: @ %bb.0:
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; CHECK-NEXT: cmp r0, #0
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; CHECK-NEXT: rsbmi r0, r0, #0
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; CHECK-NEXT: bx lr
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%tmp1neg = sub i32 0, %a
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%b = icmp sgt i32 %a, -1
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%abs = select i1 %b, i32 %a, i32 %tmp1neg
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ret i32 %abs
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}
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; rdar://11633193
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;; 3 instructions will be generated for abs(a-b):
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;; subs
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;; rsbmi
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;; bx
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define i32 @test2(i32 %a, i32 %b) nounwind readnone ssp {
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; CHECK-LABEL: test2:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: subs r0, r0, r1
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; CHECK-NEXT: rsbmi r0, r0, #0
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; CHECK-NEXT: bx lr
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entry:
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%sub = sub nsw i32 %a, %b
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%cmp = icmp sgt i32 %sub, -1
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%sub1 = sub nsw i32 0, %sub
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%cond = select i1 %cmp, i32 %sub, i32 %sub1
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ret i32 %cond
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}
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define i64 @test3(i64 %a) {
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; CHECK-LABEL: test3:
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; CHECK: @ %bb.0:
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; CHECK-NEXT: eor r0, r0, r1, asr #31
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; CHECK-NEXT: eor r2, r1, r1, asr #31
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; CHECK-NEXT: subs r0, r0, r1, asr #31
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; CHECK-NEXT: sbc r1, r2, r1, asr #31
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; CHECK-NEXT: bx lr
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%tmp1neg = sub i64 0, %a
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%b = icmp sgt i64 %a, -1
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%abs = select i1 %b, i64 %a, i64 %tmp1neg
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ret i64 %abs
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}
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declare void @callee(...)
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define void @testcallframe(i32 %a) {
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; CHECK-LABEL: testcallframe:
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; CHECK: @ %bb.0: @ %bb
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; CHECK-NEXT: .save {r11, lr}
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; CHECK-NEXT: push {r11, lr}
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; CHECK-NEXT: .pad #8
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; CHECK-NEXT: sub sp, sp, #8
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; CHECK-NEXT: cmp r0, #0
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; CHECK-NEXT: mov r1, #0
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; CHECK-NEXT: rsbmi r0, r0, #0
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; CHECK-NEXT: mov r2, #0
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; CHECK-NEXT: mov r3, #0
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; CHECK-NEXT: str r1, [sp]
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; CHECK-NEXT: bl callee
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; CHECK-NEXT: add sp, sp, #8
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; CHECK-NEXT: pop {r11, lr}
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; CHECK-NEXT: bx lr
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bb:
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%i = tail call i32 @llvm.abs.i32(i32 %a, i1 false)
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tail call void @callee(i32 %i, i32 0, i32 0, i32 0, i32 0)
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ret void
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}
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