c4cfe7a435
The old function attribute deduction pass ignores reads of constant memory and we need to copy this behavior to replace the pass completely. First step are constant globals. TBAA can also describe constant accesses and there are other possibilities. We might want to consider asking the alias analyses that are available but for now this is simpler and cheaper.
56 lines
1.8 KiB
LLVM
56 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
|
|
; Check that when argument promotion changes a function in some parent node of
|
|
; the call graph, any analyses that happened to be cached for that function are
|
|
; actually invalidated. We are using `demanded-bits` here because when printed
|
|
; it will end up caching a value for every instruction, making it easy to
|
|
; detect the instruction-level changes that will fail here. With improper
|
|
; invalidation this will crash in the second printer as it tries to reuse
|
|
; now-invalid demanded bits.
|
|
;
|
|
; RUN: opt < %s -passes='function(print<demanded-bits>),attributor,function(print<demanded-bits>)' -S | FileCheck %s
|
|
|
|
@G = constant i32 0
|
|
|
|
define internal i32 @a(i32* %x) {
|
|
; CHECK: Function Attrs: nofree nosync nounwind readnone willreturn
|
|
; CHECK-LABEL: define {{[^@]+}}@a
|
|
; CHECK-SAME: () [[ATTR0:#.*]] {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* @G, align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
entry:
|
|
%v = load i32, i32* %x
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @b() {
|
|
; CHECK: Function Attrs: nofree nosync nounwind readnone willreturn
|
|
; CHECK-LABEL: define {{[^@]+}}@b
|
|
; CHECK-SAME: () [[ATTR0]] {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[V:%.*]] = call i32 @a() [[ATTR0]]
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
entry:
|
|
%v = call i32 @a(i32* @G)
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @c() {
|
|
; CHECK: Function Attrs: nofree nosync nounwind readnone willreturn
|
|
; CHECK-LABEL: define {{[^@]+}}@c
|
|
; CHECK-SAME: () [[ATTR0]] {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[V1:%.*]] = call i32 @a() [[ATTR0]]
|
|
; CHECK-NEXT: [[V2:%.*]] = call i32 @b() [[ATTR0]]
|
|
; CHECK-NEXT: [[RESULT:%.*]] = add i32 [[V1]], [[V2]]
|
|
; CHECK-NEXT: ret i32 [[RESULT]]
|
|
;
|
|
entry:
|
|
%v1 = call i32 @a(i32* @G)
|
|
%v2 = call i32 @b()
|
|
%result = add i32 %v1, %v2
|
|
ret i32 %result
|
|
}
|