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llvm/llvm/test/Transforms/TailCallElim/tre-minmax-intrinsic.ll 

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt < %s -passes=tailcallelim -verify-dom-info -S | FileCheck %s

%struct.ListNode = type { i32, ptr }

define i32 @umin(ptr readonly %a) {
; CHECK-LABEL: define i32 @umin
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ -1, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.umin.i32(i32 -1, i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.umin.i32(i32 [[TMP0]], i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ -1, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @umin(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.umin.i32(i32 %0, i32 %call)
  br label %common.ret6
}

define i32 @umin2(ptr readonly %a) {
; CHECK-LABEL: define i32 @umin2
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ -1, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.umin.i32(i32 [[ACCUMULATOR_TR]], i32 -1)
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.umin.i32(i32 [[ACCUMULATOR_TR]], i32 [[TMP0]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ -1, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @umin2(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.umin.i32(i32 %call, i32 %0)
  br label %common.ret6
}

define i32 @umax(ptr readonly %a) {
; CHECK-LABEL: define i32 @umax
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.umax.i32(i32 0, i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.umax.i32(i32 [[TMP0]], i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ 0, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @umax(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.umax.i32(i32 %0, i32 %call)
  br label %common.ret6
}

define i32 @umax2(ptr readonly %a) {
; CHECK-LABEL: define i32 @umax2
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.umax.i32(i32 [[ACCUMULATOR_TR]], i32 0)
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.umax.i32(i32 [[ACCUMULATOR_TR]], i32 [[TMP0]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ 0, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @umax2(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.umax.i32(i32 %call, i32 %0)
  br label %common.ret6
}

define i32 @smin(ptr readonly %a) {
; CHECK-LABEL: define i32 @smin
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ 2147483647, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.smin.i32(i32 2147483647, i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.smin.i32(i32 [[TMP0]], i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ 2147483647, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @smin(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.smin.i32(i32 %0, i32 %call)
  br label %common.ret6
}

define i32 @smin2(ptr readonly %a) {
; CHECK-LABEL: define i32 @smin2
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ 2147483647, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.smin.i32(i32 [[ACCUMULATOR_TR]], i32 2147483647)
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.smin.i32(i32 [[ACCUMULATOR_TR]], i32 [[TMP0]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ 2147483647, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @smin2(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.smin.i32(i32 %call, i32 %0)
  br label %common.ret6
}

define i32 @smax(ptr readonly %a) {
; CHECK-LABEL: define i32 @smax
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ -2147483648, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.smax.i32(i32 -2147483648, i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.smax.i32(i32 [[TMP0]], i32 [[ACCUMULATOR_TR]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ -2147483648, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @smax(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.smax.i32(i32 %0, i32 %call)
  br label %common.ret6
}

define i32 @smax2(ptr readonly %a) {
; CHECK-LABEL: define i32 @smax2
; CHECK-SAME: (ptr readonly [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[TAILRECURSE:%.*]]
; CHECK:       tailrecurse:
; CHECK-NEXT:    [[ACCUMULATOR_TR:%.*]] = phi i32 [ -2147483648, [[ENTRY:%.*]] ], [ [[DOTSROA_SPECULATED:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT:    [[A_TR:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[TMP1:%.*]], [[IF_END]] ]
; CHECK-NEXT:    [[TOBOOL_NOT:%.*]] = icmp eq ptr [[A_TR]], null
; CHECK-NEXT:    br i1 [[TOBOOL_NOT]], label [[COMMON_RET6:%.*]], label [[IF_END]]
; CHECK:       common.ret6:
; CHECK-NEXT:    [[ACCUMULATOR_RET_TR:%.*]] = tail call i32 @llvm.smax.i32(i32 [[ACCUMULATOR_TR]], i32 -2147483648)
; CHECK-NEXT:    ret i32 [[ACCUMULATOR_RET_TR]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[A_TR]], align 4
; CHECK-NEXT:    [[NEXT:%.*]] = getelementptr inbounds [[STRUCT_LISTNODE:%.*]], ptr [[A_TR]], i64 0, i32 1
; CHECK-NEXT:    [[TMP1]] = load ptr, ptr [[NEXT]], align 8
; CHECK-NEXT:    [[DOTSROA_SPECULATED]] = tail call i32 @llvm.smax.i32(i32 [[ACCUMULATOR_TR]], i32 [[TMP0]])
; CHECK-NEXT:    br label [[TAILRECURSE]]
;
entry:
  %tobool.not = icmp eq ptr %a, null
  br i1 %tobool.not, label %common.ret6, label %if.end

common.ret6:                                      ; preds = %entry, %if.end
  %common.ret6.op = phi i32 [ %.sroa.speculated, %if.end ], [ -2147483648, %entry ]
  ret i32 %common.ret6.op

if.end:                                           ; preds = %entry
  %0 = load i32, ptr %a
  %next = getelementptr inbounds %struct.ListNode, ptr %a, i64 0, i32 1
  %1 = load ptr, ptr %next
  %call = tail call i32 @smax2(ptr %1)
  %.sroa.speculated = tail call i32 @llvm.smax.i32(i32 %call, i32 %0)
  br label %common.ret6
}

declare i32 @llvm.umin.i32(i32, i32)
declare i32 @llvm.umax.i32(i32, i32)
declare i32 @llvm.smin.i32(i32, i32)
declare i32 @llvm.smax.i32(i32, i32)