40 lines
896 B
LLVM
40 lines
896 B
LLVM
; RUN: opt -S -loop-simplify -loop-fusion -debug-only=loop-fusion < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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; CHECK: Could not hoist/sink all instructions
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define void @sink_preheader(i32 %N) {
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; CHECK:pre1:
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; CHECK-NEXT: br label %body1
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pre1:
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br label %body1
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; CHECK:body1:
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; CHECK-NOT: %stay =
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body1: ; preds = %pre1, %body1
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%i = phi i32 [%i_next, %body1], [0, %pre1]
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%i_next = add i32 1, %i
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%cond = icmp ne i32 %i, %N
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%barrier = add i32 1, %N
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br i1 %cond, label %body1, label %pre2
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; CHECK:pre2:
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; CHECK: %stay =
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pre2:
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%stay = add i32 1, %barrier
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br label %body2
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; CHECK: body2:
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; CHECK-NOT: %stay =
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body2: ; preds = %pre2, %body2
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%i2 = phi i32 [%i_next2, %body2], [0, %pre2]
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%i_next2 = add i32 1, %i2
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%cond2 = icmp ne i32 %i2, %N
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%barrier2 = add i32 1, %stay
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br i1 %cond2, label %body2, label %exit
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; CHECK: exit:
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; CHECK-NOT: %stay =
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exit:
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ret void
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}
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