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-rw-r--r--test/Transforms/LoopStrengthReduce/AArch64/req-regs.ll70
1 files changed, 70 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/AArch64/req-regs.ll b/test/Transforms/LoopStrengthReduce/AArch64/req-regs.ll
new file mode 100644
index 0000000..217896e
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/AArch64/req-regs.ll
@@ -0,0 +1,70 @@
+; RUN: llc -mcpu=cyclone -debug-only=loop-reduce < %s 2>&1 | FileCheck %s
+; REQUIRES: asserts
+
+; LSR used to fail here due to a bug in the ReqRegs test.
+; CHECK: The chosen solution requires
+; CHECK-NOT: No Satisfactory Solution
+
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "arm64-apple-ios"
+
+define void @do_integer_add(i64 %iterations, i8* nocapture readonly %cookie) {
+entry:
+ %N = bitcast i8* %cookie to i32*
+ %0 = load i32* %N, align 4
+ %add = add nsw i32 %0, 57
+ %cmp56 = icmp eq i64 %iterations, 0
+ br i1 %cmp56, label %while.end, label %for.cond.preheader.preheader
+
+for.cond.preheader.preheader: ; preds = %entry
+ br label %for.cond.preheader
+
+while.cond.loopexit: ; preds = %for.body
+ %add21.lcssa = phi i32 [ %add21, %for.body ]
+ %dec58 = add i64 %dec58.in, -1
+ %cmp = icmp eq i64 %dec58, 0
+ br i1 %cmp, label %while.end.loopexit, label %for.cond.preheader
+
+for.cond.preheader: ; preds = %for.cond.preheader.preheader, %while.cond.loopexit
+ %dec58.in = phi i64 [ %dec58, %while.cond.loopexit ], [ %iterations, %for.cond.preheader.preheader ]
+ %a.057 = phi i32 [ %add21.lcssa, %while.cond.loopexit ], [ %add, %for.cond.preheader.preheader ]
+ br label %for.body
+
+for.body: ; preds = %for.body, %for.cond.preheader
+ %a.154 = phi i32 [ %a.057, %for.cond.preheader ], [ %add21, %for.body ]
+ %i.053 = phi i32 [ 1, %for.cond.preheader ], [ %inc, %for.body ]
+ %inc = add nsw i32 %i.053, 1
+ %add2 = shl i32 %a.154, 1
+ %add3 = add nsw i32 %add2, %i.053
+ %add4 = shl i32 %add3, 1
+ %add5 = add nsw i32 %add4, %i.053
+ %add6 = shl i32 %add5, 1
+ %add7 = add nsw i32 %add6, %i.053
+ %add8 = shl i32 %add7, 1
+ %add9 = add nsw i32 %add8, %i.053
+ %add10 = shl i32 %add9, 1
+ %add11 = add nsw i32 %add10, %i.053
+ %add12 = shl i32 %add11, 1
+ %add13 = add nsw i32 %add12, %i.053
+ %add14 = shl i32 %add13, 1
+ %add15 = add nsw i32 %add14, %i.053
+ %add16 = shl i32 %add15, 1
+ %add17 = add nsw i32 %add16, %i.053
+ %add18 = shl i32 %add17, 1
+ %add19 = add nsw i32 %add18, %i.053
+ %add20 = shl i32 %add19, 1
+ %add21 = add nsw i32 %add20, %i.053
+ %exitcond = icmp eq i32 %inc, 1001
+ br i1 %exitcond, label %while.cond.loopexit, label %for.body
+
+while.end.loopexit: ; preds = %while.cond.loopexit
+ %add21.lcssa.lcssa = phi i32 [ %add21.lcssa, %while.cond.loopexit ]
+ br label %while.end
+
+while.end: ; preds = %while.end.loopexit, %entry
+ %a.0.lcssa = phi i32 [ %add, %entry ], [ %add21.lcssa.lcssa, %while.end.loopexit ]
+ tail call void @use_int(i32 %a.0.lcssa)
+ ret void
+}
+
+declare void @use_int(i32)