+; RUN: opt < %s -instcombine -S -default-data-layout="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" | FileCheck %s -check-prefix=CHECK -check-prefix=ALL
+; RUN: opt < %s -instcombine -S -default-data-layout="E-p:32:32:32-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" | FileCheck %s -check-prefix=P32 -check-prefix=ALL
+; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=NODL -check-prefix=ALL
+
+
+declare void @use(...)
+
+@int = global i32 zeroinitializer
+
+; Zero byte allocas should be merged if they can't be deleted.
+; CHECK-LABEL: @test(
+; CHECK: alloca
+; CHECK-NOT: alloca
+define void @test() {
+ %X = alloca [0 x i32] ; <[0 x i32]*> [#uses=1]
+ call void (...) @use( [0 x i32]* %X )
+ %Y = alloca i32, i32 0 ; <i32*> [#uses=1]
+ call void (...) @use( i32* %Y )
+ %Z = alloca { } ; <{ }*> [#uses=1]
+ call void (...) @use( { }* %Z )
+ %size = load i32, i32* @int
+ %A = alloca {{}}, i32 %size
+ call void (...) @use( {{}}* %A )
+ ret void
+}
+
+; Zero byte allocas should be deleted.
+; CHECK-LABEL: @test2(
+; CHECK-NOT: alloca
+define void @test2() {
+ %A = alloca i32 ; <i32*> [#uses=1]
+ store i32 123, i32* %A
+ ret void
+}
+
; Zero byte allocas should be deleted.
+; CHECK-LABEL: @test3(
+; CHECK-NOT: alloca
+define void @test3() {
+ %A = alloca { i32 } ; <{ i32 }*> [#uses=1]
+ %B = getelementptr { i32 }, { i32 }* %A, i32 0, i32 0 ; <i32*> [#uses=1]
+ store i32 123, i32* %B
+ ret void
+}
+
+; CHECK-LABEL: @test4(
+; CHECK: = zext i32 %n to i64
+; CHECK: %A = alloca i32, i64 %
+define i32* @test4(i32 %n) {
+ %A = alloca i32, i32 %n
+ ret i32* %A
+}
+
+; Allocas which are only used by GEPs, bitcasts, and stores (transitively)
+; should be deleted.
+define void @test5() {
+; CHECK-LABEL: @test5(
+; CHECK-NOT: alloca
+; CHECK-NOT: store
+; CHECK: ret
+
+entry:
+ %a = alloca { i32 }
+ %b = alloca i32*
+ %a.1 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0
+ store i32 123, i32* %a.1
+ store i32* %a.1, i32** %b
+ %b.1 = bitcast i32** %b to i32*
+ store i32 123, i32* %b.1
+ %a.2 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0
+ store atomic i32 2, i32* %a.2 unordered, align 4
+ %a.3 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0
+ store atomic i32 3, i32* %a.3 release, align 4
+ %a.4 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0
+ store atomic i32 4, i32* %a.4 seq_cst, align 4
+ ret void
+}
+
+declare void @f(i32* %p)
+
+; Check that we don't delete allocas in some erroneous cases.
+define void @test6() {
+; CHECK-LABEL: @test6(
+; CHECK-NOT: ret
+; CHECK: alloca
+; CHECK-NEXT: alloca
+; CHECK: ret
+
+entry:
+ %a = alloca { i32 }
+ %b = alloca i32
+ %a.1 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0
+ store volatile i32 123, i32* %a.1
+ tail call void @f(i32* %b)
+ ret void
+}
+
+; PR14371
+%opaque_type = type opaque
+%real_type = type { { i32, i32* } }
+
+@opaque_global = external constant %opaque_type, align 4
+
+define void @test7() {
+entry:
+ %0 = alloca %real_type, align 4
+ %1 = bitcast %real_type* %0 to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* bitcast (%opaque_type* @opaque_global to i8*), i32 8, i32 1, i1 false)
+ ret void
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
+
+
+; Check that the GEP indices use the pointer size, or 64 if unknown
+define void @test8() {
+; CHECK-LABEL: @test8(
+; CHECK: alloca [100 x i32]
+; CHECK: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i64 0, i64 0
+
+; P32-LABEL: @test8(
+; P32: alloca [100 x i32]
+; P32: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i32 0, i32 0
+
+; NODL-LABEL: @test8(
+; NODL: alloca [100 x i32]
+; NODL: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i64 0, i64 0
+ %x = alloca i32, i32 100
+ call void (...) @use(i32* %x)
+ ret void
+}
+
+; PR19569
+%struct_type = type { i32, i32 }
+declare void @test9_aux(<{ %struct_type }>* inalloca)
+declare i8* @llvm.stacksave()
+declare void @llvm.stackrestore(i8*)
+
+define void @test9(%struct_type* %a) {
+; CHECK-LABEL: @test9(
+entry:
+ %inalloca.save = call i8* @llvm.stacksave()
+ %argmem = alloca inalloca <{ %struct_type }>
+; CHECK: alloca inalloca i64, align 8
+ %0 = getelementptr inbounds <{ %struct_type }>, <{ %struct_type }>* %argmem, i32 0, i32 0
+ %1 = bitcast %struct_type* %0 to i8*
+ %2 = bitcast %struct_type* %a to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* %2, i32 8, i32 4, i1 false)
+ call void @test9_aux(<{ %struct_type }>* inalloca %argmem)
+ call void @llvm.stackrestore(i8* %inalloca.save)
+ ret void
+}
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep alloca
-
-declare void %use(...)
-void %test() {
- %X = alloca [0 x int]
- call void(...)* %use([0 x int] *%X)
- %Y = alloca int, uint 0
- call void(...)* %use(int* %Y)
- %Z = alloca {}
- call void(...)* %use({}* %Z)
- ret void
+define void @test10() {
+entry:
+; ALL-LABEL: @test10(
+; ALL: %v32 = alloca i1, align 8
+; ALL: %v64 = alloca i1, align 8
+; ALL: %v33 = alloca i1, align 8
+ %v32 = alloca i1, align 8
+ %v64 = alloca i1, i64 1, align 8
+ %v33 = alloca i1, i33 1, align 8
+ call void (...) @use(i1* %v32, i1* %v64, i1* %v33)
+ ret void
}
projects / oota-llvm.git / blobdiff