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TheRock/compiler/amd-llvm/llvm/test/Transforms/LoopUnroll/runtime-loop-non-exiting-latch.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

28 lines
1015 B
LLVM

; REQUIRES: asserts
; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime=true -unroll-allow-remainder=true -unroll-count=4
; Make sure that the runtime unroll does not break with a non-exiting latch.
define i32 @test(ptr %a, ptr %b, ptr %c, i64 %n) {
entry:
br label %while.cond
while.cond: ; preds = %while.body, %entry
%i.0 = phi i64 [ 0, %entry ], [ %inc, %while.body ]
%cmp = icmp slt i64 %i.0, %n
br i1 %cmp, label %while.body, label %while.end
while.body: ; preds = %while.cond
%arrayidx = getelementptr inbounds i32, ptr %b, i64 %i.0
%0 = load i32, ptr %arrayidx
%arrayidx1 = getelementptr inbounds i32, ptr %c, i64 %i.0
%1 = load i32, ptr %arrayidx1
%mul = mul nsw i32 %0, %1
%arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %i.0
store i32 %mul, ptr %arrayidx2
%inc = add nsw i64 %i.0, 1
br label %while.cond
while.end: ; preds = %while.cond
ret i32 0
}