derek.holloway
7502bf64a4
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58 lines
2.4 KiB
LLVM
58 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes=loop-fusion < %s | FileCheck %s
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; The expected output keeps body1 and body2 as separate loops.
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; body2 must execute only after body1 finishes so every store to %out
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; uses the final value left in %ptr.
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define void @fill(i32 %N, ptr %out) {
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; CHECK-LABEL: define void @fill(
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; CHECK-SAME: i32 [[N:%.*]], ptr [[OUT:%.*]]) {
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; CHECK-NEXT: [[PRE1:.*]]:
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; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
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; CHECK-NEXT: br label %[[BODY1:.*]]
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; CHECK: [[BODY1]]:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, %[[PRE1]] ], [ [[I_NEXT:%.*]], %[[BODY1]] ]
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; CHECK-NEXT: store i32 [[I]], ptr [[PTR]], align 4
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; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1
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; CHECK-NEXT: [[COND_NOT:%.*]] = icmp eq i32 [[I_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[COND_NOT]], label %[[BODY2_PREHEADER:.*]], label %[[BODY1]]
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; CHECK: [[BODY2_PREHEADER]]:
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; CHECK-NEXT: br label %[[BODY2:.*]]
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; CHECK: [[BODY2]]:
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; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], %[[BODY2]] ], [ 0, %[[BODY2_PREHEADER]] ]
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; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4
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; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[J]] to i64
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; CHECK-NEXT: [[OUT_PTR:%.*]] = getelementptr [4 x i8], ptr [[OUT]], i64 [[TMP0]]
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; CHECK-NEXT: store i32 [[VAL]], ptr [[OUT_PTR]], align 4
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; CHECK-NEXT: [[J_NEXT]] = add i32 [[J]], 1
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; CHECK-NEXT: [[COND2_NOT:%.*]] = icmp eq i32 [[J_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[COND2_NOT]], label %[[EXIT:.*]], label %[[BODY2]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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pre1:
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%ptr = alloca i32, align 4
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br label %body1
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body1: ; preds = %body1, %pre1
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%i = phi i32 [ 0, %pre1 ], [ %i_next, %body1 ]
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store i32 %i, ptr %ptr, align 4
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%i_next = add i32 %i, 1
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%cond.not = icmp eq i32 %i_next, %N
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br i1 %cond.not, label %body2, label %body1
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body2: ; preds = %body2, %body1
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%j = phi i32 [ %j_next, %body2 ], [ 0, %body1 ]
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%val = load i32, ptr %ptr, align 4
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%0 = sext i32 %j to i64
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%out_ptr = getelementptr [4 x i8], ptr %out, i64 %0
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store i32 %val, ptr %out_ptr, align 4
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%j_next = add i32 %j, 1
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%cond2.not = icmp eq i32 %j_next, %N
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br i1 %cond2.not, label %exit, label %body2
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exit: ; preds = %body2
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ret void
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}
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