; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=RV32I
; RUN: llc -mtriple=riscv64 -mattr=+d -target-abi=lp64 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=RV64I
; Selects of wide values are split into two selects, which can easily cause
; unnecessary control flow. Here we check some cases where we can currently
; emit a sequence of selects with shared control flow.
define i64 @cmovcc64(i32 signext %a, i64 %b, i64 %c) nounwind {
; RV32I-LABEL: cmovcc64:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: li a5, 123
; RV32I-NEXT: beq a0, a5, .LBB0_2
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: mv a1, a3
; RV32I-NEXT: mv a2, a4
; RV32I-NEXT: .LBB0_2: # %entry
; RV32I-NEXT: mv a0, a1
; RV32I-NEXT: mv a1, a2
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovcc64:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: li a3, 123
; RV64I-NEXT: beq a0, a3, .LBB0_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: mv a1, a2
; RV64I-NEXT: .LBB0_2: # %entry
; RV64I-NEXT: mv a0, a1
; RV64I-NEXT: ret
entry:
%cmp = icmp eq i32 %a, 123
%cond = select i1 %cmp, i64 %b, i64 %c
ret i64 %cond
}
define i128 @cmovcc128(i64 signext %a, i128 %b, i128 %c) nounwind {
; RV32I-LABEL: cmovcc128:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: xori a1, a1, 123
; RV32I-NEXT: or a1, a1, a2
; RV32I-NEXT: mv a2, a3
; RV32I-NEXT: beqz a1, .LBB1_2
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: mv a2, a4
; RV32I-NEXT: .LBB1_2: # %entry
; RV32I-NEXT: beqz a1, .LBB1_5
; RV32I-NEXT: # %bb.3: # %entry
; RV32I-NEXT: addi a5, a4, 4
; RV32I-NEXT: bnez a1, .LBB1_6
; RV32I-NEXT: .LBB1_4:
; RV32I-NEXT: addi a6, a3, 8
; RV32I-NEXT: j .LBB1_7
; RV32I-NEXT: .LBB1_5:
; RV32I-NEXT: addi a5, a3, 4
; RV32I-NEXT: beqz a1, .LBB1_4
; RV32I-NEXT: .LBB1_6: # %entry
; RV32I-NEXT: addi a6, a4, 8
; RV32I-NEXT: .LBB1_7: # %entry
; RV32I-NEXT: lw a2, 0(a2)
; RV32I-NEXT: lw a5, 0(a5)
; RV32I-NEXT: lw a6, 0(a6)
; RV32I-NEXT: beqz a1, .LBB1_9
; RV32I-NEXT: # %bb.8: # %entry
; RV32I-NEXT: addi a3, a4, 12
; RV32I-NEXT: j .LBB1_10
; RV32I-NEXT: .LBB1_9:
; RV32I-NEXT: addi a3, a3, 12
; RV32I-NEXT: .LBB1_10: # %entry
; RV32I-NEXT: lw a1, 0(a3)
; RV32I-NEXT: sw a1, 12(a0)
; RV32I-NEXT: sw a6, 8(a0)
; RV32I-NEXT: sw a5, 4(a0)
; RV32I-NEXT: sw a2, 0(a0)
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovcc128:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: li a5, 123
; RV64I-NEXT: beq a0, a5, .LBB1_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: mv a1, a3
; RV64I-NEXT: mv a2, a4
; RV64I-NEXT: .LBB1_2: # %entry
; RV64I-NEXT: mv a0, a1
; RV64I-NEXT: mv a1, a2
; RV64I-NEXT: ret
entry:
%cmp = icmp eq i64 %a, 123
%cond = select i1 %cmp, i128 %b, i128 %c
ret i128 %cond
}
define i64 @cmov64(i1 %a, i64 %b, i64 %c) nounwind {
; RV32I-LABEL: cmov64:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: andi a5, a0, 1
; RV32I-NEXT: mv a0, a1
; RV32I-NEXT: bnez a5, .LBB2_2
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: mv a0, a3
; RV32I-NEXT: mv a2, a4
; RV32I-NEXT: .LBB2_2: # %entry
; RV32I-NEXT: mv a1, a2
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmov64:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: andi a3, a0, 1
; RV64I-NEXT: mv a0, a1
; RV64I-NEXT: bnez a3, .LBB2_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: mv a0, a2
; RV64I-NEXT: .LBB2_2: # %entry
; RV64I-NEXT: ret
entry:
%cond = select i1 %a, i64 %b, i64 %c
ret i64 %cond
}
define i128 @cmov128(i1 %a, i128 %b, i128 %c) nounwind {
; RV32I-LABEL: cmov128:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: andi a1, a1, 1
; RV32I-NEXT: mv a4, a2
; RV32I-NEXT: bnez a1, .LBB3_2
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: mv a4, a3
; RV32I-NEXT: .LBB3_2: # %entry
; RV32I-NEXT: bnez a1, .LBB3_5
; RV32I-NEXT: # %bb.3: # %entry
; RV32I-NEXT: addi a5, a3, 4
; RV32I-NEXT: beqz a1, .LBB3_6
; RV32I-NEXT: .LBB3_4:
; RV32I-NEXT: addi a6, a2, 8
; RV32I-NEXT: j .LBB3_7
; RV32I-NEXT: .LBB3_5:
; RV32I-NEXT: addi a5, a2, 4
; RV32I-NEXT: bnez a1, .LBB3_4
; RV32I-NEXT: .LBB3_6: # %entry
; RV32I-NEXT: addi a6, a3, 8
; RV32I-NEXT: .LBB3_7: # %entry
; RV32I-NEXT: lw a4, 0(a4)
; RV32I-NEXT: lw a5, 0(a5)
; RV32I-NEXT: lw a6, 0(a6)
; RV32I-NEXT: bnez a1, .LBB3_9
; RV32I-NEXT: # %bb.8: # %entry
; RV32I-NEXT: addi a2, a3, 12
; RV32I-NEXT: j .LBB3_10
; RV32I-NEXT: .LBB3_9:
; RV32I-NEXT: addi a2, a2, 12
; RV32I-NEXT: .LBB3_10: # %entry
; RV32I-NEXT: lw a1, 0(a2)
; RV32I-NEXT: sw a1, 12(a0)
; RV32I-NEXT: sw a6, 8(a0)
; RV32I-NEXT: sw a5, 4(a0)
; RV32I-NEXT: sw a4, 0(a0)
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmov128:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: andi a5, a0, 1
; RV64I-NEXT: mv a0, a1
; RV64I-NEXT: bnez a5, .LBB3_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: mv a0, a3
; RV64I-NEXT: mv a2, a4
; RV64I-NEXT: .LBB3_2: # %entry
; RV64I-NEXT: mv a1, a2
; RV64I-NEXT: ret
entry:
%cond = select i1 %a, i128 %b, i128 %c
ret i128 %cond
}
define float @cmovfloat(i1 %a, float %b, float %c, float %d, float %e) nounwind {
; RV32I-LABEL: cmovfloat:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: andi a0, a0, 1
; RV32I-NEXT: bnez a0, .LBB4_2
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: fmv.w.x fa5, a4
; RV32I-NEXT: fmv.w.x fa4, a2
; RV32I-NEXT: j .LBB4_3
; RV32I-NEXT: .LBB4_2:
; RV32I-NEXT: fmv.w.x fa5, a3
; RV32I-NEXT: fmv.w.x fa4, a1
; RV32I-NEXT: .LBB4_3: # %entry
; RV32I-NEXT: fadd.s fa5, fa4, fa5
; RV32I-NEXT: fmv.x.w a0, fa5
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovfloat:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: andi a0, a0, 1
; RV64I-NEXT: bnez a0, .LBB4_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: fmv.w.x fa5, a4
; RV64I-NEXT: fmv.w.x fa4, a2
; RV64I-NEXT: j .LBB4_3
; RV64I-NEXT: .LBB4_2:
; RV64I-NEXT: fmv.w.x fa5, a3
; RV64I-NEXT: fmv.w.x fa4, a1
; RV64I-NEXT: .LBB4_3: # %entry
; RV64I-NEXT: fadd.s fa5, fa4, fa5
; RV64I-NEXT: fmv.x.w a0, fa5
; RV64I-NEXT: ret
entry:
%cond1 = select i1 %a, float %b, float %c
%cond2 = select i1 %a, float %d, float %e
%ret = fadd float %cond1, %cond2
ret float %ret
}
define double @cmovdouble(i1 %a, double %b, double %c) nounwind {
; RV32I-LABEL: cmovdouble:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw a3, 8(sp)
; RV32I-NEXT: sw a4, 12(sp)
; RV32I-NEXT: fld fa5, 8(sp)
; RV32I-NEXT: sw a1, 8(sp)
; RV32I-NEXT: andi a0, a0, 1
; RV32I-NEXT: sw a2, 12(sp)
; RV32I-NEXT: beqz a0, .LBB5_2
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: fld fa5, 8(sp)
; RV32I-NEXT: .LBB5_2: # %entry
; RV32I-NEXT: fsd fa5, 8(sp)
; RV32I-NEXT: lw a0, 8(sp)
; RV32I-NEXT: lw a1, 12(sp)
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovdouble:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: andi a0, a0, 1
; RV64I-NEXT: bnez a0, .LBB5_2
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: fmv.d.x fa5, a2
; RV64I-NEXT: fmv.x.d a0, fa5
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB5_2:
; RV64I-NEXT: fmv.d.x fa5, a1
; RV64I-NEXT: fmv.x.d a0, fa5
; RV64I-NEXT: ret
entry:
%cond = select i1 %a, double %b, double %c
ret double %cond
}
; Check that selects with dependencies on previous ones aren't incorrectly
; optimized.
define i32 @cmovccdep(i32 signext %a, i32 %b, i32 %c, i32 %d) nounwind {
; RV32I-LABEL: cmovccdep:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: li a4, 123
; RV32I-NEXT: bne a0, a4, .LBB6_3
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: mv a2, a1
; RV32I-NEXT: bne a0, a4, .LBB6_4
; RV32I-NEXT: .LBB6_2: # %entry
; RV32I-NEXT: add a0, a1, a2
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB6_3: # %entry
; RV32I-NEXT: mv a1, a2
; RV32I-NEXT: beq a0, a4, .LBB6_2
; RV32I-NEXT: .LBB6_4: # %entry
; RV32I-NEXT: add a0, a1, a3
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovccdep:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: li a4, 123
; RV64I-NEXT: bne a0, a4, .LBB6_3
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: mv a2, a1
; RV64I-NEXT: bne a0, a4, .LBB6_4
; RV64I-NEXT: .LBB6_2: # %entry
; RV64I-NEXT: addw a0, a1, a2
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB6_3: # %entry
; RV64I-NEXT: mv a1, a2
; RV64I-NEXT: beq a0, a4, .LBB6_2
; RV64I-NEXT: .LBB6_4: # %entry
; RV64I-NEXT: addw a0, a1, a3
; RV64I-NEXT: ret
entry:
%cmp = icmp eq i32 %a, 123
%cond1 = select i1 %cmp, i32 %b, i32 %c
%cond2 = select i1 %cmp, i32 %cond1, i32 %d
%ret = add i32 %cond1, %cond2
ret i32 %ret
}
; Check that selects with different conditions aren't incorrectly optimized.
define i32 @cmovdiffcc(i1 %a, i1 %b, i32 %c, i32 %d, i32 %e, i32 %f) nounwind {
; RV32I-LABEL: cmovdiffcc:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: andi a0, a0, 1
; RV32I-NEXT: andi a1, a1, 1
; RV32I-NEXT: beqz a0, .LBB7_3
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: beqz a1, .LBB7_4
; RV32I-NEXT: .LBB7_2: # %entry
; RV32I-NEXT: add a0, a2, a4
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB7_3: # %entry
; RV32I-NEXT: mv a2, a3
; RV32I-NEXT: bnez a1, .LBB7_2
; RV32I-NEXT: .LBB7_4: # %entry
; RV32I-NEXT: add a0, a2, a5
; RV32I-NEXT: ret
;
; RV64I-LABEL: cmovdiffcc:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: andi a0, a0, 1
; RV64I-NEXT: andi a1, a1, 1
; RV64I-NEXT: beqz a0, .LBB7_3
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: beqz a1, .LBB7_4
; RV64I-NEXT: .LBB7_2: # %entry
; RV64I-NEXT: addw a0, a2, a4
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB7_3: # %entry
; RV64I-NEXT: mv a2, a3
; RV64I-NEXT: bnez a1, .LBB7_2
; RV64I-NEXT: .LBB7_4: # %entry
; RV64I-NEXT: addw a0, a2, a5
; RV64I-NEXT: ret
entry:
%cond1 = select i1 %a, i32 %c, i32 %d
%cond2 = select i1 %b, i32 %e, i32 %f
%ret = add i32 %cond1, %cond2
ret i32 %ret
}
define float @CascadedSelect(float noundef %a) {
; RV32I-LABEL: CascadedSelect:
; RV32I: # %bb.0: # %entry
; RV32I-NEXT: fmv.w.x fa5, a0
; RV32I-NEXT: lui a0, 260096
; RV32I-NEXT: fmv.w.x fa4, a0
; RV32I-NEXT: flt.s a0, fa4, fa5
; RV32I-NEXT: bnez a0, .LBB8_3
; RV32I-NEXT: # %bb.1: # %entry
; RV32I-NEXT: fmv.w.x fa4, zero
; RV32I-NEXT: flt.s a0, fa5, fa4
; RV32I-NEXT: bnez a0, .LBB8_3
; RV32I-NEXT: # %bb.2: # %entry
; RV32I-NEXT: fmv.s fa4, fa5
; RV32I-NEXT: .LBB8_3: # %entry
; RV32I-NEXT: fmv.x.w a0, fa4
; RV32I-NEXT: ret
;
; RV64I-LABEL: CascadedSelect:
; RV64I: # %bb.0: # %entry
; RV64I-NEXT: fmv.w.x fa5, a0
; RV64I-NEXT: lui a0, 260096
; RV64I-NEXT: fmv.w.x fa4, a0
; RV64I-NEXT: flt.s a0, fa4, fa5
; RV64I-NEXT: bnez a0, .LBB8_3
; RV64I-NEXT: # %bb.1: # %entry
; RV64I-NEXT: fmv.w.x fa4, zero
; RV64I-NEXT: flt.s a0, fa5, fa4
; RV64I-NEXT: bnez a0, .LBB8_3
; RV64I-NEXT: # %bb.2: # %entry
; RV64I-NEXT: fmv.s fa4, fa5
; RV64I-NEXT: .LBB8_3: # %entry
; RV64I-NEXT: fmv.x.w a0, fa4
; RV64I-NEXT: ret
entry:
%cmp = fcmp ogt float %a, 1.000000e+00
%cmp1 = fcmp olt float %a, 0.000000e+00
%.a = select i1 %cmp1, float 0.000000e+00, float %a
%retval.0 = select i1 %cmp, float 1.000000e+00, float %.a
ret float %retval.0
}
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