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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AArch64/arm64-ands-bad-peephole.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

32 lines
1.1 KiB
LLVM

; RUN: llc %s -o - -aarch64-enable-atomic-cfg-tidy=0 | FileCheck %s
; Check that ANDS (tst) is not merged with ADD when the immediate
; is not 0.
; <rdar://problem/16693089>
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios"
; CHECK-LABEL: tst1:
; CHECK: add [[REG:w[0-9]+]], w{{[0-9]+}}, #1
; CHECK: tst [[REG]], #0x1
define void @tst1(i1 %tst, i32 %true) {
entry:
br i1 %tst, label %for.end, label %for.body
for.body: ; preds = %for.body, %entry
%result.09 = phi i32 [ %add2.result.0, %for.body ], [ 1, %entry ]
%i.08 = phi i32 [ %inc, %for.body ], [ 2, %entry ]
%and = and i32 %i.08, 1
%cmp1 = icmp eq i32 %and, 0
%add2.result.0 = select i1 %cmp1, i32 %true, i32 %result.09
%inc = add nsw i32 %i.08, 1
%cmp = icmp slt i32 %i.08, %true
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.body
%add2.result.0.lcssa = phi i32 [ %add2.result.0, %for.body ]
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
ret void
}