llvm/test/CodeGen/RISCV/riscv-promote-constant.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt %s -S -riscv-promote-const -mtriple=riscv64 -mattr=+d | FileCheck %s

; No promotion should take place, as the pass skips floats.
define float @multiple_floats(float %a, float %b) {
; CHECK-LABEL: define float @multiple_floats(
; CHECK-SAME: float [[A:%.*]], float [[B:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[ADD1:%.*]] = fadd float [[A]], 1.000000e+00
; CHECK-NEXT:    [[ADD2:%.*]] = fadd float [[B]], 2.000000e+00
; CHECK-NEXT:    [[SUM_F:%.*]] = fadd float [[ADD1]], [[ADD2]]
; CHECK-NEXT:    ret float [[SUM_F]]
;
entry:
  %add1 = fadd float %a, 1.0
  %add2 = fadd float %b, 2.0
  %sum_f = fadd float %add1, %add2
  ret float %sum_f
}

; No promotion should take place as cases with a single constant are skipped.
define double @single_double(double %a) {
; CHECK-LABEL: define double @single_double(
; CHECK-SAME: double [[A:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd double [[A]], 4.210000e+01
; CHECK-NEXT:    ret double [[ADD]]
;
entry:
  %add = fadd double %a, 42.1
  ret double %add
}

; Promotion should happen as we have at least two unique constants that would
; otherwise go in the constant pool.
define double @multiple_doubles(double %a, double %b) {
; CHECK-LABEL: define double @multiple_doubles(
; CHECK-SAME: double [[A:%.*]], double [[B:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[DOUBLE_VAL1:%.*]] = load double, ptr getelementptr inbounds ([2 x double], ptr @.promoted_doubles.multiple_doubles, i64 0, i64 1), align 8
; CHECK-NEXT:    [[ADD3:%.*]] = load double, ptr @.promoted_doubles.multiple_doubles, align 8
; CHECK-NEXT:    [[ADD2:%.*]] = fadd double [[A]], [[ADD3]]
; CHECK-NEXT:    [[ADD4:%.*]] = fadd double [[B]], [[DOUBLE_VAL1]]
; CHECK-NEXT:    [[SUM:%.*]] = fadd double [[ADD2]], [[ADD3]]
; CHECK-NEXT:    [[SUM1:%.*]] = fadd double [[ADD4]], [[SUM]]
; CHECK-NEXT:    ret double [[SUM1]]
;
entry:
  %add1 = fadd double %a, 2.718
  %add2 = fadd double %b, 42.1
  %add3 = fadd double %add1, 2.718
  %sum = fadd double %add2, %add3
  ret double %sum
}

; Promotion should not happen as the constants will be materialised rather
; than using the constant pool.
define double @multiple_doubles_no_promote(double %a, double %b) {
; CHECK-LABEL: define double @multiple_doubles_no_promote(
; CHECK-SAME: double [[A:%.*]], double [[B:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[ADD1:%.*]] = fadd double [[A]], 1.000000e+00
; CHECK-NEXT:    [[ADD2:%.*]] = fadd double [[B]], 2.000000e+00
; CHECK-NEXT:    [[ADD3:%.*]] = fadd double [[ADD1]], 1.000000e+00
; CHECK-NEXT:    [[SUM:%.*]] = fadd double [[ADD2]], [[ADD3]]
; CHECK-NEXT:    ret double [[SUM]]
;
entry:
  %add1 = fadd double %a, 1.0
  %add2 = fadd double %b, 2.0
  %add3 = fadd double %add1, 1.0
  %sum = fadd double %add2, %add3
  ret double %sum
}

; The same constant shouldn't be loaded more than once per BB.
define double @multiple_doubles_multi_bb(double %a, i1 %cond) {
; CHECK-LABEL: define double @multiple_doubles_multi_bb(
; CHECK-SAME: double [[A:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_TRUE:.*]], label %[[IF_FALSE:.*]]
; CHECK:       [[IF_TRUE]]:
; CHECK-NEXT:    [[DOUBLE_VAL2:%.*]] = load double, ptr getelementptr inbounds ([2 x double], ptr @.promoted_doubles.multiple_doubles_multi_bb, i64 0, i64 1), align 8
; CHECK-NEXT:    [[DOUBLE_VAL:%.*]] = load double, ptr @.promoted_doubles.multiple_doubles_multi_bb, align 8
; CHECK-NEXT:    [[ADD_T:%.*]] = fadd double [[A]], [[DOUBLE_VAL]]
; CHECK-NEXT:    [[MUL_T:%.*]] = fmul double [[ADD_T]], [[DOUBLE_VAL2]]
; CHECK-NEXT:    [[SUB_T:%.*]] = fsub double [[MUL_T]], [[DOUBLE_VAL]]
; CHECK-NEXT:    br label %[[IF_END:.*]]
; CHECK:       [[IF_FALSE]]:
; CHECK-NEXT:    [[DOUBLE_VAL3:%.*]] = load double, ptr getelementptr inbounds ([2 x double], ptr @.promoted_doubles.multiple_doubles_multi_bb, i64 0, i64 1), align 8
; CHECK-NEXT:    [[DOUBLE_VAL1:%.*]] = load double, ptr @.promoted_doubles.multiple_doubles_multi_bb, align 8
; CHECK-NEXT:    [[ADD_F:%.*]] = fadd double [[A]], [[DOUBLE_VAL1]]
; CHECK-NEXT:    [[MUL_F:%.*]] = fmul double [[ADD_F]], [[DOUBLE_VAL3]]
; CHECK-NEXT:    [[SUB_F:%.*]] = fsub double [[MUL_F]], [[DOUBLE_VAL1]]
; CHECK-NEXT:    br label %[[IF_END]]
; CHECK:       [[IF_END]]:
; CHECK-NEXT:    [[PHI_RES:%.*]] = phi double [ [[SUB_T]], %[[IF_TRUE]] ], [ [[SUB_F]], %[[IF_FALSE]] ]
; CHECK-NEXT:    ret double [[PHI_RES]]
;
entry:
  br i1 %cond, label %if.true, label %if.false

if.true:
  %add.t = fadd double %a, 1.23
  %mul.t = fmul double %add.t, 4.56
  %sub.t = fsub double %mul.t, 1.23
  br label %if.end

if.false:
  %add.f = fadd double %a, 1.23
  %mul.f = fmul double %add.f, 4.56
  %sub.f = fsub double %mul.f, 1.23
  br label %if.end

if.end:
  %phi.res = phi double [ %sub.t, %if.true ], [ %sub.f, %if.false ]
  ret double %phi.res
}

; Check the insertion point in the case we have a phi taking a constant C and
; the source block also uses that same constant.
define double @multiple_doubles_phi(double %a, i1 %cond) {
; CHECK-LABEL: define double @multiple_doubles_phi(
; CHECK-SAME: double [[A:%.*]], i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    [[DOUBLE_VAL:%.*]] = load double, ptr @.promoted_doubles.multiple_doubles_phi, align 8
; CHECK-NEXT:    [[MUL:%.*]] = fmul double [[A]], [[DOUBLE_VAL]]
; CHECK-NEXT:    br label %[[IF_END]]
; CHECK:       [[IF_END]]:
; CHECK-NEXT:    [[PHI_VAL:%.*]] = phi double [ [[DOUBLE_VAL]], %[[IF_THEN]] ], [ [[A]], %[[ENTRY]] ]
; CHECK-NEXT:    [[DOUBLE_VAL1:%.*]] = load double, ptr getelementptr inbounds ([2 x double], ptr @.promoted_doubles.multiple_doubles_phi, i64 0, i64 1), align 8
; CHECK-NEXT:    [[RES:%.*]] = fadd double [[PHI_VAL]], [[DOUBLE_VAL1]]
; CHECK-NEXT:    ret double [[RES]]
;
entry:
  br i1 %cond, label %if.then, label %if.end

if.then:
  %mul = fmul double %a, 1.23
  br label %if.end

if.end:
  %phi.val = phi double [ 1.23, %if.then ], [ %a, %entry ]
  %res = fadd double %phi.val, 4.56
  ret double %res
}