derek.holloway
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111 lines
3.2 KiB
LLVM
111 lines
3.2 KiB
LLVM
;; Demonstrate that the ABI alignment is used over the preferred alignment.
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;;
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;; In both runs, pointers are 32-bit but we can only store the function returing
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;; the 64-bit constant in the vtable if the ABI alignment for an i64 is 32 since
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;; we cannot guarantee a 64-bit ABI alignment if the vtable is 32-bit aligned.
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; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility --data-layout="e-p:32:32-i64:32:64" %s | FileCheck %s --check-prefixes=COMMON,ABI32
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; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility --data-layout="e-p:32:32-i64:64:64" %s | FileCheck %s --check-prefixes=COMMON,ABI64
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; ABI32: [[VT6DATA:@[^ ]*]] = {{.*}} { [4 x i8], [2 x ptr], [8 x i8] }
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; ABI32-SAME: [8 x i8] c"\05\00\00\00\00\00\00\00"
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; ABI64: [[VT6DATA:@[^ ]*]] = {{.*}} { [4 x i8], [2 x ptr], [0 x i8] }
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; ABI64-SAME: zeroinitializer
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; COMMON-SAME: }, !type [[T:![0-9]+]]
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@vt6 = constant [2 x ptr] [
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ptr @vf10i8,
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ptr @vf5i64
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], !type !1
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; ABI32: [[VT6DATA:@[^ ]*]] = {{.*}} { [4 x i8], [2 x ptr], [8 x i8] }
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; ABI32-SAME: [8 x i8] c"\06\00\00\00\00\00\00\00"
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; ABI64: [[VT6DATA:@[^ ]*]] = {{.*}} { [4 x i8], [2 x ptr], [0 x i8] }
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; ABI64-SAME: zeroinitializer
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; COMMON-SAME: }, !type [[T]]
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@vt7 = constant [2 x ptr] [
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ptr @vf9i8,
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ptr @vf6i64
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], !type !1
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define i1 @vf0i1(ptr %this) readnone {
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ret i1 0
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}
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define i1 @vf1i1(ptr %this) readnone {
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ret i1 1
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}
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define i8 @vf0i8(ptr %this) readnone {
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ret i8 2
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}
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define i8 @vf1i8(ptr %this) readnone {
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ret i8 3
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}
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define i32 @vf1i32(ptr %this) readnone {
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ret i32 1
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}
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define i32 @vf2i32(ptr %this) readnone {
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ret i32 2
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}
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define i32 @vf3i32(ptr %this) readnone {
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ret i32 3
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}
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define i32 @vf4i32(ptr %this) readnone {
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ret i32 4
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}
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define i64 @vf5i64(ptr %this) readnone {
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ret i64 5
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}
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define i64 @vf6i64(ptr %this) readnone {
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ret i64 6
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}
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define i8 @vf9i8(ptr %this) readnone {
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ret i8 10
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}
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define i8 @vf10i8(ptr %this) readnone {
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ret i8 11
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}
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; COMMON-LABEL: define i8 @call0(
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define i8 @call0(ptr %obj) {
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%vtable = load ptr, ptr %obj
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%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [3 x ptr], ptr %vtable, i32 0, i32 0
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%fptr = load ptr, ptr %fptrptr
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%result = call i8 %fptr(ptr %obj)
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ret i8 %result
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; COMMON: [[VTGEP:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 -1
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; COMMON: [[VTLOAD:%[^ ]*]] = load i8, ptr [[VTGEP]]
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; COMMON: ret i8 [[VTLOAD]]
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}
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; COMMON-LABEL: define i64 @call1(
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define i64 @call1(ptr %obj) {
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%vtable = load ptr, ptr %obj
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%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [3 x ptr], ptr %vtable, i32 0, i32 1
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%fptr = load ptr, ptr %fptrptr
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%result = call i64 %fptr(ptr %obj)
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ret i64 %result
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; ABI32: [[VTGEP:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 8
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; ABI32-NEXT: [[VTLOAD:%[^ ]*]] = load i64, ptr [[VTGEP]]
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; ABI64: [[VTGEP:%[^ ]*]] = getelementptr [3 x ptr], ptr %vtable, i32 0, i32 1
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; ABI64-NEXT: [[FUNC:%[^ ]*]] = load ptr, ptr [[VTGEP]], align 4
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; ABI64-NEXT: [[VTLOAD:%[^ ]*]] = call i64 [[FUNC]](ptr %obj)
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; COMMON-NEXT: ret i64 [[VTLOAD]]
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}
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; COMMON: [[T]] = !{i32 4, !"typeid"}
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!1 = !{i32 0, !"typeid"}
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