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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV64I %s
;; There are a few different ways to lower (select (or A, B), X, Y). This test
;; ensures that we do so with as few branches as possible.
define signext i32 @select_of_or(i1 zeroext %a, i1 zeroext %b, i32 signext %c, i32 signext %d) nounwind {
; RV32I-LABEL: select_of_or:
; RV32I: # %bb.0:
; RV32I-NEXT: or a1, a0, a1
; RV32I-NEXT: mv a0, a2
; RV32I-NEXT: bnez a1, .LBB0_2
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: mv a0, a3
; RV32I-NEXT: .LBB0_2:
; RV32I-NEXT: ret
;
; RV64I-LABEL: select_of_or:
; RV64I: # %bb.0:
; RV64I-NEXT: or a1, a0, a1
; RV64I-NEXT: mv a0, a2
; RV64I-NEXT: bnez a1, .LBB0_2
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: mv a0, a3
; RV64I-NEXT: .LBB0_2:
; RV64I-NEXT: ret
%1 = or i1 %a, %b
%2 = select i1 %1, i32 %c, i32 %d
ret i32 %2
}
declare signext i32 @either() nounwind
declare signext i32 @neither() nounwind
define signext i32 @if_of_or(i1 zeroext %a, i1 zeroext %b) nounwind {
; RV32I-LABEL: if_of_or:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: bnez a0, .LBB1_3
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: bnez a1, .LBB1_3
; RV32I-NEXT: # %bb.2: # %if.else
; RV32I-NEXT: call neither
; RV32I-NEXT: j .LBB1_4
; RV32I-NEXT: .LBB1_3: # %if.then
; RV32I-NEXT: call either
; RV32I-NEXT: .LBB1_4: # %if.end
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV64I-LABEL: if_of_or:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: bnez a0, .LBB1_3
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: bnez a1, .LBB1_3
; RV64I-NEXT: # %bb.2: # %if.else
; RV64I-NEXT: call neither
; RV64I-NEXT: j .LBB1_4
; RV64I-NEXT: .LBB1_3: # %if.then
; RV64I-NEXT: call either
; RV64I-NEXT: .LBB1_4: # %if.end
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
%1 = or i1 %a, %b
br i1 %1, label %if.then, label %if.else
if.then:
%2 = tail call i32 @either()
br label %if.end
if.else:
%3 = tail call i32 @neither()
br label %if.end
if.end:
%4 = phi i32 [%2, %if.then], [%3, %if.else]
ret i32 %4
}
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