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llvm-mirror/test/CodeGen/Hexagon/addsubcarry.ll
Krzysztof Parzyszek 0a4ed009a4 [SelectionDAG] Expand UADDO/USUBO into ADD/SUBCARRY if legal for target
Additionally, implement handling of ADD/SUBCARRY on Hexagon, utilizing
the UADDO/USUBO expansion.

Differential Revision: https://reviews.llvm.org/D47559

llvm-svn: 333751
2018-06-01 14:00:32 +00:00

26 lines
644 B
LLVM

; RUN: llc -march=hexagon < %s | FileCheck %s
@g = global i128 zeroinitializer, align 8
; CHECK-LABEL: addc:
; CHECK: p[[P0:[0-3]]] = and(p[[P1:[0-9]]],!p[[P1]])
; CHECK: add({{.*}},{{.*}},p[[P0]]):carry
; CHECK: add({{.*}},{{.*}},p[[P0]]):carry
define void @addc(i128 %a0, i128 %a1) #0 {
%v0 = add i128 %a0, %a1
store i128 %v0, i128* @g, align 8
ret void
}
; CHECK-LABEL: subc:
; CHECK: p[[P0:[0-3]]] = or(p[[P1:[0-9]]],!p[[P1]])
; CHECK: sub({{.*}},{{.*}},p[[P0]]):carry
; CHECK: sub({{.*}},{{.*}},p[[P0]]):carry
define void @subc(i128 %a0, i128 %a1) #0 {
%v0 = sub i128 %a0, %a1
store i128 %v0, i128* @g, align 8
ret void
}