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