4796b4ae7b
Currently global SRA uses the GEP structure to determine how to split the global. This patch instead analyses the loads and stores that are performed on the global, and collects which types are used at which offset, and then splits the global according to those. This is both more general, and works fine with opaque pointers. This is also closer to how ordinary SROA is performed. Differential Revision: https://reviews.llvm.org/D117223
41 lines
1.4 KiB
LLVM
41 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
|
|
; RUN: opt -S -globalopt -opaque-pointers < %s | FileCheck %s
|
|
|
|
; Global SRA should not be performed here (or at least not naively), as
|
|
; offset 4 is accessed as both i32 and i64.
|
|
|
|
%T = type { i32, i32, i32, i32 }
|
|
@g = internal global %T zeroinitializer
|
|
|
|
;.
|
|
; CHECK: @[[G:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr global [[T:%.*]] zeroinitializer
|
|
;.
|
|
define void @test1() {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: store i32 1, ptr getelementptr inbounds ([[T:%.*]], ptr @g, i64 0, i32 1), align 4
|
|
; CHECK-NEXT: store i32 2, ptr getelementptr inbounds ([[T]], ptr @g, i64 0, i32 2), align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
store i32 1, ptr getelementptr (%T, ptr @g, i64 0, i32 1)
|
|
store i32 2, ptr getelementptr (%T, ptr @g, i64 0, i32 2)
|
|
ret void
|
|
}
|
|
|
|
define i32 @load1() {
|
|
; CHECK-LABEL: @load1(
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, ptr getelementptr inbounds ([[T:%.*]], ptr @g, i64 0, i32 1), align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%v = load i32, ptr getelementptr (%T, ptr @g, i64 0, i32 1)
|
|
ret i32 %v
|
|
}
|
|
|
|
define i64 @load2() {
|
|
; CHECK-LABEL: @load2(
|
|
; CHECK-NEXT: [[V:%.*]] = load i64, ptr getelementptr inbounds ([[T:%.*]], ptr @g, i64 0, i32 2), align 4
|
|
; CHECK-NEXT: ret i64 [[V]]
|
|
;
|
|
%v = load i64, ptr getelementptr (%T, ptr @g, i64 0, i32 2)
|
|
ret i64 %v
|
|
}
|