1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
3 ; RUN: | FileCheck -check-prefix=RV32I %s
4 ; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
5 ; RUN: | FileCheck -check-prefix=RV64I %s
7 ;; There are a few different ways to lower (select (or A, B), X, Y). This test
8 ;; ensures that we do so with as few branches as possible.
10 define signext i32 @select_of_or(i1 zeroext %a, i1 zeroext %b, i32 signext %c, i32 signext %d) nounwind {
11 ; RV32I-LABEL: select_of_or:
13 ; RV32I-NEXT: or a1, a0, a1
14 ; RV32I-NEXT: mv a0, a2
15 ; RV32I-NEXT: bnez a1, .LBB0_2
16 ; RV32I-NEXT: # %bb.1:
17 ; RV32I-NEXT: mv a0, a3
18 ; RV32I-NEXT: .LBB0_2:
21 ; RV64I-LABEL: select_of_or:
23 ; RV64I-NEXT: or a1, a0, a1
24 ; RV64I-NEXT: mv a0, a2
25 ; RV64I-NEXT: bnez a1, .LBB0_2
26 ; RV64I-NEXT: # %bb.1:
27 ; RV64I-NEXT: mv a0, a3
28 ; RV64I-NEXT: .LBB0_2:
31 %2 = select i1 %1, i32 %c, i32 %d
35 declare signext i32 @either() nounwind
36 declare signext i32 @neither() nounwind
38 define signext i32 @if_of_or(i1 zeroext %a, i1 zeroext %b) nounwind {
39 ; RV32I-LABEL: if_of_or:
41 ; RV32I-NEXT: addi sp, sp, -16
42 ; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
43 ; RV32I-NEXT: bnez a0, .LBB1_3
44 ; RV32I-NEXT: # %bb.1:
45 ; RV32I-NEXT: bnez a1, .LBB1_3
46 ; RV32I-NEXT: # %bb.2: # %if.else
47 ; RV32I-NEXT: call neither
48 ; RV32I-NEXT: j .LBB1_4
49 ; RV32I-NEXT: .LBB1_3: # %if.then
50 ; RV32I-NEXT: call either
51 ; RV32I-NEXT: .LBB1_4: # %if.end
52 ; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
53 ; RV32I-NEXT: addi sp, sp, 16
56 ; RV64I-LABEL: if_of_or:
58 ; RV64I-NEXT: addi sp, sp, -16
59 ; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
60 ; RV64I-NEXT: bnez a0, .LBB1_3
61 ; RV64I-NEXT: # %bb.1:
62 ; RV64I-NEXT: bnez a1, .LBB1_3
63 ; RV64I-NEXT: # %bb.2: # %if.else
64 ; RV64I-NEXT: call neither
65 ; RV64I-NEXT: j .LBB1_4
66 ; RV64I-NEXT: .LBB1_3: # %if.then
67 ; RV64I-NEXT: call either
68 ; RV64I-NEXT: .LBB1_4: # %if.end
69 ; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
70 ; RV64I-NEXT: addi sp, sp, 16
73 br i1 %1, label %if.then, label %if.else
76 %2 = tail call i32 @either()
80 %3 = tail call i32 @neither()
84 %4 = phi i32 [%2, %if.then], [%3, %if.else]