Update optimization passes to handle inalloca arguments

Summary:
I searched Transforms/ and Analysis/ for 'ByVal' and updated those call
sites to check for inalloca if appropriate.

I added tests for any change that would allow an optimization to fire on
inalloca.

Reviewers: nlewycky

Differential Revision: http://llvm-reviews.chandlerc.com/D2449

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200281 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 49 insertions, 0 deletions

diff --git a/test/Transforms/ArgumentPromotion/inalloca.ll b/test/Transforms/ArgumentPromotion/inalloca.ll
new file mode 100644
index 0000000000..513a968255
--- /dev/null
+++ b/test/Transforms/ArgumentPromotion/inalloca.ll
@@ -0,0 +1,49 @@
+; RUN: opt %s -argpromotion -scalarrepl -S | FileCheck %s
+
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
+
+%struct.ss = type { i32, i32 }
+
+; Argpromote + scalarrepl should change this to passing the two integers by value.
+define internal i32 @f(%struct.ss* inalloca  %s) {
+entry:
+  %f0 = getelementptr %struct.ss* %s, i32 0, i32 0
+  %f1 = getelementptr %struct.ss* %s, i32 0, i32 1
+  %a = load i32* %f0, align 4
+  %b = load i32* %f1, align 4
+  %r = add i32 %a, %b
+  ret i32 %r
+}
+; CHECK-LABEL: define internal i32 @f
+; CHECK-NOT: load
+; CHECK: ret
+
+define i32 @main() {
+entry:
+  %S = alloca %struct.ss
+  %f0 = getelementptr %struct.ss* %S, i32 0, i32 0
+  %f1 = getelementptr %struct.ss* %S, i32 0, i32 1
+  store i32 1, i32* %f0, align 4
+  store i32 2, i32* %f1, align 4
+  %r = call i32 @f(%struct.ss* inalloca %S)
+  ret i32 %r
+}
+; CHECK-LABEL: define i32 @main
+; CHECK-NOT: load
+; CHECK: ret
+
+; Argpromote can't promote %a because of the icmp use.
+define internal i1 @g(%struct.ss* %a, %struct.ss* inalloca %b) nounwind  {
+; CHECK: define internal i1 @g(%struct.ss* %a, %struct.ss* inalloca %b)
+entry:
+  %c = icmp eq %struct.ss* %a, %b
+  ret i1 %c
+}
+
+define i32 @test() {
+entry:
+  %S = alloca %struct.ss
+  %c = call i1 @g(%struct.ss* %S, %struct.ss* inalloca %S)
+; CHECK: call i1 @g(%struct.ss* %S, %struct.ss* inalloca %S)
+  ret i32 0
+}