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llvm-project/llvm/test/Transforms/LoopVectorize/select-last-index-fp.ll
Florian Hahn 57f486195a
[LV] Add additional tests for FP argmin/argmax. 
Extend existing tests to cover both finding first/last argmin/argmax for
floating point reductions.
2026-02-22 21:32:13 +00:00

687 lines
31 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -S %s | FileCheck %s
; Basic fmax last-index with non-strict predicate (ole: max.val <= l).
define i64 @test_fmax_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmax_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan ole float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call nnan float @llvm.maxnum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan ole float %max.val, %l
%max.val.next = call nnan float @llvm.maxnum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
; fmax last-index with flipped comparison (oge: l >= max.val).
define i64 @test_fmax_last_idx_cond_flipped(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmax_last_idx_cond_flipped(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan oge float [[L]], [[MAX_VAL]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call nnan float @llvm.maxnum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan oge float %l, %max.val
%max.val.next = call nnan float @llvm.maxnum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
; fmin last-index with non-strict predicate (oge: min.val >= l).
define i64 @test_fmin_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmin_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ 0x47EFFFFFE0000000, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan oge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = call nnan float @llvm.minnum.f32(float [[L]], float [[MIN_VAL]])
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ 0x47EFFFFFE0000000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan oge float %min.val, %l
%min.val.next = call nnan float @llvm.minnum.f32(float %l, float %min.val)
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
; fmin last-index with flipped comparison (ole: l <= min.val).
define i64 @test_fmin_last_idx_cond_flipped(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmin_last_idx_cond_flipped(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ 0x47EFFFFFE0000000, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan ole float [[L]], [[MIN_VAL]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = call nnan float @llvm.minnum.f32(float [[L]], float [[MIN_VAL]])
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ 0x47EFFFFFE0000000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan ole float %l, %min.val
%min.val.next = call nnan float @llvm.minnum.f32(float %l, float %min.val)
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
; fmax last-index without nnan: should NOT vectorize via the argmax path.
define i64 @test_fmax_last_idx_no_nnan(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmax_last_idx_no_nnan(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp ole float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call float @llvm.maxnum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp ole float %max.val, %l
%max.val.next = call float @llvm.maxnum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
; fmax last-index with double precision.
define i64 @test_fmax_last_idx_double(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmax_last_idx_double(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi double [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr double, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load double, ptr [[GEP]], align 8
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan ole double [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call nnan double @llvm.maxnum.f64(double [[L]], double [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi double [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr double, ptr %src, i64 %iv
%l = load double, ptr %gep
%cmp = fcmp nnan ole double %max.val, %l
%max.val.next = call nnan double @llvm.maxnum.f64(double %l, double %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
; fmax last-index using llvm.maximum intrinsic (FMaximum recurrence kind).
define i64 @test_fmaximum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmaximum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan ole float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call nnan float @llvm.maximum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan ole float %max.val, %l
%max.val.next = call nnan float @llvm.maximum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
; fmin last-index using llvm.minimumnum intrinsic (FMinimumNum recurrence kind).
define i64 @test_fminimumnum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fminimumnum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ 0x47EFFFFFE0000000, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan oge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = call nnan float @llvm.minimumnum.f32(float [[L]], float [[MIN_VAL]])
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ 0x47EFFFFFE0000000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan oge float %min.val, %l
%min.val.next = call nnan float @llvm.minimumnum.f32(float %l, float %min.val)
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
; fmin last-index using llvm.minimum intrinsic (FMinimum recurrence kind).
define i64 @test_fminimum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fminimum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ 0x47EFFFFFE0000000, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan oge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = call nnan float @llvm.minimum.f32(float [[L]], float [[MIN_VAL]])
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ 0x47EFFFFFE0000000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan oge float %min.val, %l
%min.val.next = call nnan float @llvm.minimum.f32(float %l, float %min.val)
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
; fmax last-index using llvm.maximumnum intrinsic (FMaximumNum recurrence kind).
define i64 @test_fmaximumnum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_fmaximumnum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ 0xC7EFFFFFE0000000, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp nnan ole float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call nnan float @llvm.maximumnum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ 0xC7EFFFFFE0000000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp nnan ole float %max.val, %l
%max.val.next = call nnan float @llvm.maximumnum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fmaxnum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fmaxnum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ -3.000000e+00, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp uge float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = call float @llvm.maxnum.f32(float [[L]], float [[MAX_VAL]])
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ -3.0000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp uge float %max.val, %l
%max.val.next = call float @llvm.maxnum.f32(float %l, float %max.val)
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fmax_last_idx_without_fmfs(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fmax_last_idx_without_fmfs(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ -3.000000e+00, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp ule float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = select i1 [[CMP]], float [[L]], float [[MAX_VAL]]
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ -3.0000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp ule float %max.val, %l
%max.val.next = select i1 %cmp, float %l, float %max.val
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fmax_last_idx_with_fmfs(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fmax_last_idx_with_fmfs(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MAX_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MAX_VAL:%.*]] = phi float [ -3.000000e+00, %[[ENTRY]] ], [ [[MAX_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp ule float [[MAX_VAL]], [[L]]
; CHECK-NEXT: [[MAX_VAL_NEXT]] = select fast i1 [[CMP]], float [[L]], float [[MAX_VAL]]
; CHECK-NEXT: [[MAX_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MAX_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MAX_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%max.idx = phi i64 [ 0, %entry ], [ %max.idx.next, %loop ]
%max.val = phi float [ -3.0000, %entry ], [ %max.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp ule float %max.val, %l
%max.val.next = select fast i1 %cmp, float %l, float %max.val
%max.idx.next = select i1 %cmp, i64 %iv, i64 %max.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %max.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fminnum_last_idx(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fminnum_last_idx(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ -3.000000e+00, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp uge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = call float @llvm.minnum.f32(float [[L]], float [[MIN_VAL]])
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ -3.0000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp uge float %min.val, %l
%min.val.next = call float @llvm.minnum.f32(float %l, float %min.val)
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fmin_last_idx_without_fmfs(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fmin_last_idx_without_fmfs(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ 1.000000e+01, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp uge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = select i1 [[CMP]], float [[L]], float [[MIN_VAL]]
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ 10.0000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp uge float %min.val, %l
%min.val.next = select i1 %cmp, float %l, float %min.val
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
define i64 @test_select_fmin_last_idx_with_fmfs(ptr %src, i64 %n) {
; CHECK-LABEL: define i64 @test_select_fmin_last_idx_with_fmfs(
; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_IDX:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[MIN_IDX_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[MIN_VAL:%.*]] = phi float [ -5.000000e+00, %[[ENTRY]] ], [ [[MIN_VAL_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT: [[L:%.*]] = load float, ptr [[GEP]], align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp uge float [[MIN_VAL]], [[L]]
; CHECK-NEXT: [[MIN_VAL_NEXT]] = select fast i1 [[CMP]], float [[L]], float [[MIN_VAL]]
; CHECK-NEXT: [[MIN_IDX_NEXT]] = select i1 [[CMP]], i64 [[IV]], i64 [[MIN_IDX]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[MIN_IDX_NEXT]], %[[LOOP]] ]
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%min.idx = phi i64 [ 0, %entry ], [ %min.idx.next, %loop ]
%min.val = phi float [ -5.0000, %entry ], [ %min.val.next, %loop ]
%gep = getelementptr float, ptr %src, i64 %iv
%l = load float, ptr %gep
%cmp = fcmp uge float %min.val, %l
%min.val.next = select fast i1 %cmp, float %l, float %min.val
%min.idx.next = select i1 %cmp, i64 %iv, i64 %min.idx
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, %n
br i1 %exitcond.not, label %exit, label %loop
exit:
%res = phi i64 [ %min.idx.next, %loop ]
ret i64 %res
}
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