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90105ec5c8
The optimisation remarks for loop unrolling with an unrolled remainder looks something like:
test.c:7:18: remark: completely unrolled loop with 3 iterations [-Rpass=loop-unroll]
C[i] += A[i*N+j];
^
test.c:6:9: remark: unrolled loop by a factor of 4 with run-time trip count [-Rpass=loop-unroll]
for(int j = 0; j < N; j++)
^
This removes the first of the two messages.
Differential revision: https://reviews.llvm.org/D38725
llvm-svn: 316986
48 lines
1.8 KiB
LLVM
48 lines
1.8 KiB
LLVM
; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=16 2>&1 | FileCheck -check-prefix=COMPLETE-UNROLL %s
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; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=4 2>&1 | FileCheck -check-prefix=PARTIAL-UNROLL %s
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; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=4 -unroll-runtime=true -unroll-remainder 2>&1 | FileCheck %s --check-prefix=RUNTIME-UNROLL
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; COMPLETE-UNROLL: remark: {{.*}}: completely unrolled loop with 16 iterations
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; PARTIAL-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4
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; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4
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define i32 @sum() {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ]
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%add = add nsw i32 %i.05, 4
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%call = tail call i32 @baz(i32 %add) #2
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%add1 = add nsw i32 %call, %s.06
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%inc = add nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 16
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 %add1
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}
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; RUNTIME-UNROLL-NOT: remark: {{.*}}: completely unrolled loop with 3 iterations
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; RUNTIME-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4
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define i32 @runtime(i32 %n) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ]
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%add = add nsw i32 %i.05, 4
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%call = tail call i32 @baz(i32 %add) #2
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%add1 = add nsw i32 %call, %s.06
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%inc = add nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 %add1
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}
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declare i32 @baz(i32) |