Do not eliminate allocas whose alignment exceeds that of the

[oota-llvm.git] / test / Transforms / ScalarRepl / memcpy-from-global.ll

diff --git a/test/Transforms/ScalarRepl/memcpy-from-global.ll b/test/Transforms/ScalarRepl/memcpy-from-global.ll
index e5bf52289a93c769df29184f93929d2fa3e77a24..5557a8fd87540db95b3b5672d5825593d939d825 100644 (file)
--- a/test/Transforms/ScalarRepl/memcpy-from-global.ll
+++ b/test/Transforms/ScalarRepl/memcpy-from-global.ll
@@ -1,11 +1,19 @@
-; RUN: opt %s -scalarrepl -S | not grep {call.*memcpy}
+; RUN: opt < %s -scalarrepl -S | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
 @C.0.1248 = internal constant [128 x float] [ float -1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float 0.000000e+00, float -1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float -1.000000e+00, float 0.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00 ], align 32               ; <[128 x float]*> [#uses=1]
 
-define float @grad4(i32 %hash, float %x, float %y, float %z, float %w) {
+define float @test1(i32 %hash, float %x, float %y, float %z, float %w) {
 entry:
        %lookupTable = alloca [128 x float], align 16           ; <[128 x float]*> [#uses=5]
        %lookupTable1 = bitcast [128 x float]* %lookupTable to i8*              ; <i8*> [#uses=1]
        call void @llvm.memcpy.i32( i8* %lookupTable1, i8* bitcast ([128 x float]* @C.0.1248 to i8*), i32 512, i32 16 )
+        
+; CHECK: @test1
+; CHECK-NOT: alloca
+; CHECK-NOT: call{{.*}}@llvm.memcpy
+; CHECK: %lookupTable1 = bitcast [128 x float]* @C.0.1248 to i8*
+; CHECK-NOT: call{{.*}}@llvm.memcpy
+        
        %tmp3 = shl i32 %hash, 2                ; <i32> [#uses=1]
        %tmp5 = and i32 %tmp3, 124              ; <i32> [#uses=4]
        %tmp753 = getelementptr [128 x float]* %lookupTable, i32 0, i32 %tmp5           ; <float*> [#uses=1]
@@ -31,3 +39,108 @@ entry:
 }
 
 declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)
+
+
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+
+%T = type { i8, [123 x i8] }
+%U = type { i32, i32, i32, i32, i32 }
+
+@G = constant %T {i8 1, [123 x i8] zeroinitializer }
+@H = constant [2 x %U] zeroinitializer, align 16
+
+define void @test2() {
+  %A = alloca %T
+  %B = alloca %T
+  %a = bitcast %T* %A to i8*
+  %b = bitcast %T* %B to i8*
+
+; CHECK: @test2
+
+; %A alloca is deleted
+; CHECK-NEXT: %B = alloca %T
+
+; use @G instead of %A
+; CHECK-NEXT: %a = bitcast %T* @G to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %b, i8* %a, i64 124, i32 4, i1 false)
+  call void @bar(i8* %b)
+  ret void
+}
+
+declare void @bar(i8*)
+
+
+;; Should be able to eliminate the alloca.
+define void @test3() {
+  %A = alloca %T
+  %a = bitcast %T* %A to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false)
+  call void @bar(i8* %a) readonly
+; CHECK: @test3
+; CHECK-NEXT: %a = bitcast %T* @G to i8*
+; CHECK-NEXT: call void @bar(i8* %a)
+  ret void
+}
+
+define void @test4() {
+  %A = alloca %T
+  %a = bitcast %T* %A to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false)
+  call void @baz(i8* byval %a) 
+; CHECK: @test4
+; CHECK-NEXT: %a = bitcast %T* @G to i8*
+; CHECK-NEXT: call void @baz(i8* byval %a)
+  ret void
+}
+
+declare void @llvm.lifetime.start(i64, i8*)
+define void @test5() {
+  %A = alloca %T
+  %a = bitcast %T* %A to i8*
+  call void @llvm.lifetime.start(i64 -1, i8* %a)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false)
+  call void @baz(i8* byval %a) 
+; CHECK: @test5
+; CHECK-NEXT: %a = bitcast %T* @G to i8*
+; CHECK-NEXT: call void @baz(i8* byval %a)
+  ret void
+}
+
+
+declare void @baz(i8* byval)
+
+
+define void @test6() {
+  %A = alloca %U, align 16
+  %a = bitcast %U* %A to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast ([2 x %U]* @H to i8*), i64 20, i32 16, i1 false)
+  call void @bar(i8* %a) readonly
+; CHECK: @test6
+; CHECK-NEXT: %a = bitcast
+; CHECK-NEXT: call void @bar(i8* %a)
+  ret void
+}
+
+define void @test7() {
+  %A = alloca %U, align 16
+  %a = bitcast %U* %A to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%U* getelementptr ([2 x %U]* @H, i64 0, i32 0) to i8*), i64 20, i32 4, i1 false)
+  call void @bar(i8* %a) readonly
+; CHECK: @test7
+; CHECK-NEXT: %a = bitcast
+; CHECK-NEXT: call void @bar(i8* %a)
+  ret void
+}
+
+define void @test8() {
+  %A = alloca %U, align 16
+  %a = bitcast %U* %A to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%U* getelementptr ([2 x %U]* @H, i64 0, i32 1) to i8*), i64 20, i32 4, i1 false)
+  call void @bar(i8* %a) readonly
+; CHECK: @test8
+; CHECK: llvm.memcpy
+; CHECK: bar
+  ret void
+}