From 6c428d6ff60dff05c132f389b87bc36feb4afc1b Mon Sep 17 00:00:00 2001
From: Wei Mi <wmi@google.com>
Date: Fri, 20 Mar 2015 18:33:12 +0000
Subject: Correctly estimate SROA savings for store operands in inline cost
 analysis.

When estimating SROA savings, we want to see if an address is derived
off an alloca in the caller. For store instructions, operand 1 is the
address operand, but the current code uses operand 0.  Use
getPointerOperand for loads and stores to fix this.

Patch by Easwaran Raman.
http://reviews.llvm.org/D8425

llvm-svn: 232827
---
 llvm/test/Transforms/Inline/store-sroa.ll | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 llvm/test/Transforms/Inline/store-sroa.ll

(limited to 'llvm/test/Transforms/Inline')

diff --git a/llvm/test/Transforms/Inline/store-sroa.ll b/llvm/test/Transforms/Inline/store-sroa.ll
new file mode 100644
index 00000000000..6b1ca964d33
--- /dev/null
+++ b/llvm/test/Transforms/Inline/store-sroa.ll
@@ -0,0 +1,22 @@
+; RUN: opt -S -O2 -inline-threshold=1 < %s | FileCheck %s
+
+%class.A = type { i32 }
+
+define void @_Z3barP1A(%class.A* %a) #0 {
+entry:
+  %a1 = getelementptr inbounds %class.A, %class.A* %a, i64 0, i32 0
+  %0 = load i32, i32* %a1, align 4
+  %add = add nsw i32 %0, 10
+  store i32 %add, i32* %a1, align 4
+  ret void
+}
+
+define void @_Z3foov() #0 {
+; CHECK-LABEL: @_Z3foov(
+; CHECK-NOT: call void @_Z3barP1A
+; CHECK: ret
+entry:
+  %a = alloca %class.A, align 4
+  call void @_Z3barP1A(%class.A* %a)
+  ret void
+}
-- 
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