a820261bf3
The NPM processes loops in forward program order, whereas the legacy PM processes them in reverse program order. No reason to test both PMs here, so just stick to the NPM.
105 lines
3.6 KiB
LLVM
105 lines
3.6 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -mcpu=core-avx2 -passes=loop-unroll -debug-only=loop-unroll -S -unroll-allow-partial < %s 2>&1 | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK: Loop Unroll: F[foo] Loop %loop.header
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; CHECK: Loop Size = 25
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; CHECK: UNROLLING loop %loop.header by 2
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; CHECK: Loop Unroll: F[foo] Loop %loop.2.header
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; CHECK: Loop Size = 27
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; CHECK-NOT: UNROLLING loop %loop.2.header
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define void @foo(i32 * %out) {
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entry:
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%0 = alloca [1024 x i32]
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%x0 = alloca [1024 x i32]
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%x01 = alloca [1024 x i32]
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%x02 = alloca [1024 x i32]
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%x03 = alloca [1024 x i32]
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%x04 = alloca [1024 x i32]
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%x05 = alloca [1024 x i32]
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%x06 = alloca [1024 x i32]
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br label %loop.header
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loop.header:
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%counter = phi i32 [0, %entry], [%inc, %loop.inc]
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br label %loop.body
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loop.body:
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%ptr = getelementptr [1024 x i32], [1024 x i32]* %0, i32 0, i32 %counter
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store i32 %counter, i32* %ptr
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%val = add i32 %counter, 5
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%xptr = getelementptr [1024 x i32], [1024 x i32]* %x0, i32 0, i32 %counter
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store i32 %val, i32* %xptr
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%val1 = add i32 %counter, 6
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%xptr1 = getelementptr [1024 x i32], [1024 x i32]* %x01, i32 0, i32 %counter
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store i32 %val1, i32* %xptr1
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%val2 = add i32 %counter, 7
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%xptr2 = getelementptr [1024 x i32], [1024 x i32]* %x02, i32 0, i32 %counter
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store i32 %val2, i32* %xptr2
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%val3 = add i32 %counter, 8
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%xptr3 = getelementptr [1024 x i32], [1024 x i32]* %x03, i32 0, i32 %counter
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store i32 %val3, i32* %xptr3
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%val4 = add i32 %counter, 9
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%xptr4 = getelementptr [1024 x i32], [1024 x i32]* %x04, i32 0, i32 %counter
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store i32 %val4, i32* %xptr4
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%val5 = add i32 %counter, 10
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%xptr5 = getelementptr [1024 x i32], [1024 x i32]* %x05, i32 0, i32 %counter
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store i32 %val5, i32* %xptr5
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br label %loop.inc
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loop.inc:
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%inc = add i32 %counter, 2
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%1 = icmp sge i32 %inc, 1023
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br i1 %1, label %exit.0, label %loop.header
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exit.0:
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%2 = getelementptr [1024 x i32], [1024 x i32]* %0, i32 0, i32 5
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%3 = load i32, i32* %2
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store i32 %3, i32 * %out
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br label %loop.2.header
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loop.2.header:
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%counter.2 = phi i32 [0, %exit.0], [%inc.2, %loop.2.inc]
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br label %loop.2.body
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loop.2.body:
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%ptr.2 = getelementptr [1024 x i32], [1024 x i32]* %0, i32 0, i32 %counter.2
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store i32 %counter.2, i32* %ptr.2
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%val.2 = add i32 %counter.2, 5
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%xptr.2 = getelementptr [1024 x i32], [1024 x i32]* %x0, i32 0, i32 %counter.2
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store i32 %val.2, i32* %xptr.2
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%val1.2 = add i32 %counter.2, 6
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%xptr1.2 = getelementptr [1024 x i32], [1024 x i32]* %x01, i32 0, i32 %counter.2
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store i32 %val1, i32* %xptr1.2
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%val2.2 = add i32 %counter.2, 7
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%xptr2.2 = getelementptr [1024 x i32], [1024 x i32]* %x02, i32 0, i32 %counter.2
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store i32 %val2, i32* %xptr2.2
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%val3.2 = add i32 %counter.2, 8
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%xptr3.2 = getelementptr [1024 x i32], [1024 x i32]* %x03, i32 0, i32 %counter.2
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store i32 %val3.2, i32* %xptr3.2
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%val4.2 = add i32 %counter.2, 9
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%xptr4.2 = getelementptr [1024 x i32], [1024 x i32]* %x04, i32 0, i32 %counter.2
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store i32 %val4.2, i32* %xptr4.2
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%val5.2 = add i32 %counter.2, 10
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%xptr5.2 = getelementptr [1024 x i32], [1024 x i32]* %x05, i32 0, i32 %counter.2
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store i32 %val5.2, i32* %xptr5.2
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%xptr6.2 = getelementptr [1024 x i32], [1024 x i32]* %x06, i32 0, i32 %counter.2
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store i32 %val5.2, i32* %xptr6.2
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br label %loop.2.inc
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loop.2.inc:
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%inc.2 = add i32 %counter.2, 2
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%4 = icmp sge i32 %inc.2, 1023
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br i1 %4, label %exit.2, label %loop.2.header
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exit.2:
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%x2 = getelementptr [1024 x i32], [1024 x i32]* %0, i32 0, i32 6
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%x3 = load i32, i32* %x2
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%out2 = getelementptr i32, i32 * %out, i32 1
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store i32 %3, i32 * %out2
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ret void
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}
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