1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
; RUN: opt < %s -S -passes=loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
; When examining gep-instructions we shouldn't consider them simplified if the
; corresponding memory access isn't simplified. Doing the opposite might bias
; our estimate, so that we might decide to unroll even a simple memcpy loop.
;
; Thus, the following loop shouldn't be unrolled:
; CHECK-LABEL: @not_simplified_geps
; CHECK: br i1 %
; CHECK: ret void
define void @not_simplified_geps(ptr noalias %b, ptr noalias %c) {
entry:
br label %for.body
for.body:
%iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ]
%arrayidx1 = getelementptr inbounds i32, ptr %b, i64 %iv.0
%x1 = load i32, ptr %arrayidx1, align 4
%arrayidx2 = getelementptr inbounds i32, ptr %c, i64 %iv.0
store i32 %x1, ptr %arrayidx2, align 4
%iv.1 = add nuw nsw i64 %iv.0, 1
%exitcond = icmp eq i64 %iv.1, 10
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
}
|
