derek.holloway
7502bf64a4
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52 lines
1.9 KiB
LLVM
52 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes=indvars -S %s | FileCheck %s
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@a = global [4 x i32] zeroinitializer, align 16
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define i32 @test() {
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; CHECK-LABEL: define i32 @test() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
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; CHECK-NEXT: [[RED:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[RED_NEXT:%.*]], [[LOOP_LATCH]] ]
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; CHECK-NEXT: [[IDXPROM:%.*]] = zext i8 [[IV]] to i64
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr @a, i64 [[IDXPROM]]
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; CHECK-NEXT: br i1 false, label [[LOOP_LATCH]], label [[EXIT_1:%.*]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[L:%.*]] = load i32, ptr [[GEP]], align 4
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; CHECK-NEXT: [[RED_NEXT]] = add nsw i32 [[L]], [[RED]]
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1
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; CHECK-NEXT: br i1 true, label [[LOOP_HEADER]], label [[EXIT_2:%.*]]
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; CHECK: exit.1:
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; CHECK-NEXT: ret i32 0
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; CHECK: exit.2:
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; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[RED_NEXT]], [[LOOP_LATCH]] ]
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; CHECK-NEXT: ret i32 [[ADD_LCSSA]]
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;
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop.latch ]
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%red = phi i32 [ 0, %entry ], [ %red.next, %loop.latch ]
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%idxprom = zext i8 %iv to i64
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%gep = getelementptr i32, ptr @a, i64 %idxprom
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%f = icmp ult ptr %gep, getelementptr inbounds ([4 x i32], ptr @a, i64 1, i64 0)
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br i1 %f, label %loop.latch, label %exit.1
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loop.latch:
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%l = load i32, ptr %gep, align 4
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%red.next = add nsw i32 %l, %red
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%iv.next = add nuw nsw i8 %iv, 1
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%cmp = icmp ult i8 %iv, 4
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br i1 %cmp, label %loop.header, label %exit.2
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exit.1: ; preds = %for.body
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ret i32 0
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exit.2:
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%add.lcssa = phi i32 [ %red.next, %loop.latch ]
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ret i32 %add.lcssa
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}
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