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TheRock/compiler/amd-llvm/llvm/test/CodeGen/Thumb2/lsr-deficiency.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
1.4 KiB
LLVM

; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic | FileCheck %s
; rdar://7387640
; This now reduces to a single induction variable.
@G = external global i32 ; <ptr> [#uses=2]
@array = external global ptr ; <ptr> [#uses=1]
define void @t() nounwind optsize {
; CHECK-LABEL: t:
; CHECK: mov{{.*}}, #1000
entry:
%.pre = load i32, ptr @G, align 4 ; <i32> [#uses=1]
br label %bb
bb: ; preds = %bb, %entry
; CHECK: LBB0_1:
; CHECK: subs [[R2:r[0-9]+]], #1
; CHECK: adds {{.*}}, [[R2]], #1
; CHECK: bne LBB0_1
%0 = phi i32 [ %.pre, %entry ], [ %3, %bb ] ; <i32> [#uses=1]
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
%tmp5 = sub i32 1000, %indvar ; <i32> [#uses=1]
%1 = load ptr, ptr @array, align 4 ; <ptr> [#uses=1]
%scevgep = getelementptr i32, ptr %1, i32 %tmp5 ; <ptr> [#uses=1]
%2 = load i32, ptr %scevgep, align 4 ; <i32> [#uses=1]
%3 = add nsw i32 %2, %0 ; <i32> [#uses=2]
store i32 %3, ptr @G, align 4
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 1001 ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %bb
return: ; preds = %bb
ret void
}