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; 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
; 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
; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=NODL
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* @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 }* %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 }* %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 }* %a, i32 0, i32 0
store atomic i32 2, i32* %a.2 unordered, align 4
%a.3 = getelementptr { i32 }* %a, i32 0, i32 0
store atomic i32 3, i32* %a.3 release, align 4
%a.4 = getelementptr { 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 }* %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]* %x1, i64 0, i64 0
; P32-LABEL: @test8(
; P32: alloca [100 x i32]
; P32: getelementptr inbounds [100 x i32]* %x1, i32 0, i32 0
; NODL-LABEL: @test8(
; NODL: alloca [100 x i32]
; NODL: getelementptr inbounds [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 }>* %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
}
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