llvm-project/llvm/test/Transforms/IndVarSimplify/canonicalize-cmp.ll

144 lines
3.9 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -indvars < %s | FileCheck %s
; Check that we replace signed comparisons between non-negative values with
; unsigned comparisons if we can.
target datalayout = "n8:16:32:64"
define i32 @test_01(i32 %a, i32 %b, i32* %p) {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_ENTRY:%.*]]
; CHECK: loop.entry:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[IV]], 100
; CHECK-NEXT: br i1 [[CMP1]], label [[B1:%.*]], label [[B2:%.*]]
; CHECK: b1:
; CHECK-NEXT: store i32 [[IV]], i32* [[P:%.*]], align 4
; CHECK-NEXT: br label [[MERGE:%.*]]
; CHECK: b2:
; CHECK-NEXT: store i32 [[A:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[IV]], 100
; CHECK-NEXT: br i1 [[CMP2]], label [[B3:%.*]], label [[B4:%.*]]
; CHECK: b3:
; CHECK-NEXT: store i32 [[IV]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: b4:
; CHECK-NEXT: store i32 [[B:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: loop.be:
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[IV_NEXT]], 1000
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP_ENTRY]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i32 999
;
entry:
br label %loop.entry
loop.entry:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
%cmp1 = icmp slt i32 %iv, 100
br i1 %cmp1, label %b1, label %b2
b1:
store i32 %iv, i32* %p
br label %merge
b2:
store i32 %a, i32* %p
br label %merge
merge:
%cmp2 = icmp ult i32 %iv, 100
br i1 %cmp2, label %b3, label %b4
b3:
store i32 %iv, i32* %p
br label %loop.be
b4:
store i32 %b, i32* %p
br label %loop.be
loop.be:
%iv.next = add i32 %iv, 1
%cmp3 = icmp slt i32 %iv.next, 1000
br i1 %cmp3, label %loop.entry, label %exit
exit:
ret i32 %iv
}
define i32 @test_02(i32 %a, i32 %b, i32* %p) {
; CHECK-LABEL: @test_02(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_ENTRY:%.*]]
; CHECK: loop.entry:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 100, [[IV]]
; CHECK-NEXT: br i1 [[CMP1]], label [[B1:%.*]], label [[B2:%.*]]
; CHECK: b1:
; CHECK-NEXT: store i32 [[IV]], i32* [[P:%.*]], align 4
; CHECK-NEXT: br label [[MERGE:%.*]]
; CHECK: b2:
; CHECK-NEXT: store i32 [[A:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 100, [[IV]]
; CHECK-NEXT: br i1 [[CMP2]], label [[B3:%.*]], label [[B4:%.*]]
; CHECK: b3:
; CHECK-NEXT: store i32 [[IV]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: b4:
; CHECK-NEXT: store i32 [[B:%.*]], i32* [[P]], align 4
; CHECK-NEXT: br label [[LOOP_BE]]
; CHECK: loop.be:
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[IV_NEXT]], 1000
; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP_ENTRY]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i32 999
;
entry:
br label %loop.entry
loop.entry:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
%cmp1 = icmp sgt i32 100, %iv
br i1 %cmp1, label %b1, label %b2
b1:
store i32 %iv, i32* %p
br label %merge
b2:
store i32 %a, i32* %p
br label %merge
merge:
%cmp2 = icmp ugt i32 100, %iv
br i1 %cmp2, label %b3, label %b4
b3:
store i32 %iv, i32* %p
br label %loop.be
b4:
store i32 %b, i32* %p
br label %loop.be
loop.be:
%iv.next = add i32 %iv, 1
%cmp3 = icmp sgt i32 1000, %iv.next
br i1 %cmp3, label %loop.entry, label %exit
exit:
ret i32 %iv
}