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TheRock/compiler/amd-llvm/llvm/test/Analysis/ScalarEvolution/scev-expander-reuse-gep.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

37 lines
1.3 KiB
LLVM

; PR30213. Check scev expand will generate correct code if the value
; in ValueOffsetPair is of pointer type.
; RUN: opt -mtriple=i386-apple-macosx10.12.0 < %s -loop-reduce -S | FileCheck %s
; CHECK: %ptr4.ptr1 = select i1 %cmp.i, ptr %ptr4, ptr %ptr1
; CHECK-NEXT: %scevgep = getelementptr nuw i8, ptr %ptr4.ptr1, i32 1
; CHECK-NEXT: br label %while.cond.i
target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.12.0"
; Function Attrs: nounwind optsize ssp
define void @Foo() {
entry:
switch i2 undef, label %sw.epilog102 [
i2 -2, label %sw.bb28
]
sw.bb28: ; preds = %entry
%0 = load ptr, ptr undef, align 2
%ptr1 = getelementptr inbounds i8, ptr undef, i32 -1
%ptr4 = getelementptr inbounds i8, ptr %0, i32 -1
%cmp.i = icmp ult ptr undef, %0
%ptr4.ptr1 = select i1 %cmp.i, ptr %ptr4, ptr %ptr1
br label %while.cond.i
while.cond.i: ; preds = %while.cond.i, %sw.bb28
%currPtr.1.i = phi ptr [ %incdec.ptr.i, %while.cond.i ], [ %ptr4.ptr1, %sw.bb28 ]
%incdec.ptr.i = getelementptr inbounds i8, ptr %currPtr.1.i, i32 1
%1 = load i8, ptr %incdec.ptr.i, align 1
br label %while.cond.i
sw.epilog102: ; preds = %entry
unreachable
}