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TheRock/compiler/amd-llvm/polly/test/ScopInfo/bounded_loop_assumptions.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

64 lines
2.3 KiB
LLVM

; RUN: opt %loadNPMPolly '-passes=polly-custom<scops>' -polly-print-scops -disable-output < %s 2>&1 | FileCheck %s
;
; The assumed context is tricky here as the equality test for the inner loop
; allows an "unbounded" loop trip count. We assume that does not happen, thus
; if N <= 1 the outer loop is not executed and we are done, if N >= 3 the
; equality test in the inner exit condition will trigger at some point and,
; finally, if N == 2 we would have an unbounded inner loop.
;
; CHECK: Assumed Context:
; CHECK-NEXT: [N] -> { : }
; CHECK: Invalid Context:
; CHECK-NEXT: [N] -> { : N = 2 }
;
; int jd(int *restrict A, int x, int N) {
; for (int i = 1; i < N; i++)
; for (int j = 3; j < N; j++)
; x += A[i];
; return x;
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define i32 @jd(ptr noalias %A, i32 %x, i32 %N) {
entry:
%tmp = sext i32 %N to i64
br label %for.cond
for.cond: ; preds = %for.inc4, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc4 ], [ 1, %entry ]
%x.addr.0 = phi i32 [ %x, %entry ], [ %x.addr.1.lcssa, %for.inc4 ]
%cmp = icmp slt i64 %indvars.iv, %tmp
br i1 %cmp, label %for.body, label %for.end6
for.body: ; preds = %for.cond
br label %for.cond1
for.cond1: ; preds = %for.inc, %for.body
%x.addr.1 = phi i32 [ %x.addr.0, %for.body ], [ %add, %for.inc ]
%j.0 = phi i32 [ 3, %for.body ], [ %inc, %for.inc ]
%exitcond = icmp ne i32 %j.0, %N
br i1 %exitcond, label %for.body3, label %for.end
for.body3: ; preds = %for.cond1
br label %for.inc
for.inc: ; preds = %for.body3
%arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
%tmp1 = load i32, ptr %arrayidx, align 4
%add = add nsw i32 %x.addr.1, %tmp1
%inc = add i32 %j.0, 1
br label %for.cond1
for.end: ; preds = %for.cond1
%x.addr.1.lcssa = phi i32 [ %x.addr.1, %for.cond1 ]
br label %for.inc4
for.inc4: ; preds = %for.end
%indvars.iv.next = add i64 %indvars.iv, 1
br label %for.cond
for.end6: ; preds = %for.cond
ret i32 %x.addr.0
}