[RS4GC] Fix rematerialization of bitcast of bitcast.

[oota-llvm.git] / test / Transforms / Inline / byval.ll

diff --git a/test/Transforms/Inline/byval.ll b/test/Transforms/Inline/byval.ll
index ea8c3576038603cd434e1321436b71d674e8a892..d4edf2503cf6f3771bcc33d01b09aac2d48aea8e 100644 (file)
--- a/test/Transforms/Inline/byval.ll
+++ b/test/Transforms/Inline/byval.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -inline | llvm-dis | grep {llvm.memcpy}
+; RUN: opt < %s -inline -S | FileCheck %s
 
 ; Inlining a byval struct should cause an explicit copy into an alloca.
 
@@ -7,8 +7,8 @@
 
 define internal void @f(%struct.ss* byval  %b) nounwind  {
 entry:
-       %tmp = getelementptr %struct.ss* %b, i32 0, i32 0               ; <i32*> [#uses=2]
-       %tmp1 = load i32* %tmp, align 4         ; <i32> [#uses=1]
+       %tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0           ; <i32*> [#uses=2]
+       %tmp1 = load i32, i32* %tmp, align 4            ; <i32> [#uses=1]
        %tmp2 = add i32 %tmp1, 1                ; <i32> [#uses=1]
        store i32 %tmp2, i32* %tmp, align 4
        ret void
@@ -16,13 +16,114 @@ entry:
 
 declare i32 @printf(i8*, ...) nounwind 
 
-define i32 @main() nounwind  {
+define i32 @test1() nounwind  {
 entry:
        %S = alloca %struct.ss          ; <%struct.ss*> [#uses=4]
-       %tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0              ; <i32*> [#uses=1]
+       %tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0          ; <i32*> [#uses=1]
        store i32 1, i32* %tmp1, align 8
-       %tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1              ; <i64*> [#uses=1]
+       %tmp4 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 1          ; <i64*> [#uses=1]
        store i64 2, i64* %tmp4, align 4
        call void @f( %struct.ss* byval  %S ) nounwind 
        ret i32 0
+; CHECK: @test1()
+; CHECK: %S1 = alloca %struct.ss
+; CHECK: %S = alloca %struct.ss
+; CHECK: call void @llvm.memcpy
+; CHECK: ret i32 0
+}
+
+; Inlining a byval struct should NOT cause an explicit copy 
+; into an alloca if the function is readonly
+
+define internal i32 @f2(%struct.ss* byval  %b) nounwind readonly {
+entry:
+       %tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0           ; <i32*> [#uses=2]
+       %tmp1 = load i32, i32* %tmp, align 4            ; <i32> [#uses=1]
+       %tmp2 = add i32 %tmp1, 1                ; <i32> [#uses=1]
+       ret i32 %tmp2
+}
+
+define i32 @test2() nounwind  {
+entry:
+       %S = alloca %struct.ss          ; <%struct.ss*> [#uses=4]
+       %tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0          ; <i32*> [#uses=1]
+       store i32 1, i32* %tmp1, align 8
+       %tmp4 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 1          ; <i64*> [#uses=1]
+       store i64 2, i64* %tmp4, align 4
+       %X = call i32 @f2( %struct.ss* byval  %S ) nounwind 
+       ret i32 %X
+; CHECK: @test2()
+; CHECK: %S = alloca %struct.ss
+; CHECK-NOT: call void @llvm.memcpy
+; CHECK: ret i32
+}
+
+
+; Inlining a byval with an explicit alignment needs to use *at least* that
+; alignment on the generated alloca.
+; PR8769
+declare void @g3(%struct.ss* %p)
+
+define internal void @f3(%struct.ss* byval align 64 %b) nounwind {
+   call void @g3(%struct.ss* %b)  ;; Could make alignment assumptions!
+   ret void
+}
+
+define void @test3() nounwind  {
+entry:
+       %S = alloca %struct.ss, align 1  ;; May not be aligned.
+       call void @f3( %struct.ss* byval align 64 %S) nounwind 
+       ret void
+; CHECK: @test3()
+; CHECK: %S1 = alloca %struct.ss, align 64
+; CHECK: %S = alloca %struct.ss
+; CHECK: call void @llvm.memcpy
+; CHECK: call void @g3(%struct.ss* %S1)
+; CHECK: ret void
+}
+
+
+; Inlining a byval struct should NOT cause an explicit copy 
+; into an alloca if the function is readonly, but should increase an alloca's
+; alignment to satisfy an explicit alignment request.
+
+define internal i32 @f4(%struct.ss* byval align 64 %b) nounwind readonly {
+        call void @g3(%struct.ss* %b)
+       ret i32 4
+}
+
+define i32 @test4() nounwind  {
+entry:
+       %S = alloca %struct.ss, align 2         ; <%struct.ss*> [#uses=4]
+       %X = call i32 @f4( %struct.ss* byval align 64 %S ) nounwind 
+       ret i32 %X
+; CHECK: @test4()
+; CHECK: %S = alloca %struct.ss, align 64
+; CHECK-NOT: call void @llvm.memcpy
+; CHECK: call void @g3
+; CHECK: ret i32 4
+}
+
+%struct.S0 = type { i32 }
+
+@b = global %struct.S0 { i32 1 }, align 4
+@a = common global i32 0, align 4
+
+define internal void @f5(%struct.S0* byval nocapture readonly align 4 %p) {
+entry:
+       store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
+       %f2 = getelementptr inbounds %struct.S0, %struct.S0* %p, i64 0, i32 0
+       %0 = load i32, i32* %f2, align 4
+       store i32 %0, i32* @a, align 4
+       ret void
+}
+
+define i32 @test5() {
+entry:
+       tail call void @f5(%struct.S0* byval align 4 @b)
+       %0 = load i32, i32* @a, align 4
+       ret i32 %0
+; CHECK: @test5()
+; CHECK: store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
+; CHECK-NOT: load i32, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4
 }