dcc7706fcf
A @llvm.experimental.noalias.scope.decl is only useful if there is !alias.scope and !noalias metadata that uses the declared scope. When that is not the case for at least one of the two, the intrinsic call can as well be removed. Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D95141
166 lines
5.6 KiB
LLVM
166 lines
5.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -O3 -S | FileCheck %s
|
|
; RUN: opt < %s -passes='default<O3>' -S | FileCheck %s
|
|
|
|
; This is based on the following most basic C++ code:
|
|
;
|
|
; struct S {
|
|
; int* data;
|
|
; int x, y, z;
|
|
; };
|
|
;
|
|
; S gen(S a) {
|
|
; S b;
|
|
; b.data = a.data;
|
|
; return b;
|
|
; }
|
|
;
|
|
; void escape0(S);
|
|
;
|
|
; int* foo(S a) {
|
|
; S b = gen(a);
|
|
; escape0(b);
|
|
; return b.data;
|
|
; }
|
|
;
|
|
; int cond();
|
|
; void sync0();
|
|
; void sync1();
|
|
; void escape0(int*);
|
|
; void escape1(int*);
|
|
;
|
|
; int* bar(S a) {
|
|
; S b = gen(a);
|
|
; if(cond()) {
|
|
; sync0();
|
|
; escape0(b.data);
|
|
; } else {
|
|
; sync1();
|
|
; escape1(b.data);
|
|
; }
|
|
; return b.data;
|
|
; }
|
|
;
|
|
; There are no inttoptr casts in the original source code, nor should there be any in the optimized IR.
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
%0 = type { i32*, i32, i32, i32 }
|
|
|
|
define dso_local void @_Z3gen1S(%0* noalias sret(%0) align 8 %arg, %0* byval(%0) align 8 %arg1) {
|
|
; CHECK-LABEL: @_Z3gen1S(
|
|
; CHECK-NEXT: bb:
|
|
; CHECK-NEXT: [[I:%.*]] = getelementptr inbounds [[TMP0:%.*]], %0* [[ARG1:%.*]], i64 0, i32 0
|
|
; CHECK-NEXT: [[I2:%.*]] = load i32*, i32** [[I]], align 8
|
|
; CHECK-NEXT: [[I3:%.*]] = getelementptr inbounds [[TMP0]], %0* [[ARG:%.*]], i64 0, i32 0
|
|
; CHECK-NEXT: store i32* [[I2]], i32** [[I3]], align 8
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
bb:
|
|
%i = getelementptr inbounds %0, %0* %arg1, i32 0, i32 0
|
|
%i2 = load i32*, i32** %i, align 8
|
|
%i3 = getelementptr inbounds %0, %0* %arg, i32 0, i32 0
|
|
store i32* %i2, i32** %i3, align 8
|
|
ret void
|
|
}
|
|
|
|
define dso_local i32* @_Z3foo1S(%0* byval(%0) align 8 %arg) {
|
|
; CHECK-LABEL: @_Z3foo1S(
|
|
; CHECK-NEXT: bb:
|
|
; CHECK-NEXT: [[I2:%.*]] = alloca [[TMP0:%.*]], align 8
|
|
; CHECK-NEXT: [[I1_SROA_0_0_I5_SROA_IDX:%.*]] = getelementptr inbounds [[TMP0]], %0* [[ARG:%.*]], i64 0, i32 0
|
|
; CHECK-NEXT: [[I1_SROA_0_0_COPYLOAD:%.*]] = load i32*, i32** [[I1_SROA_0_0_I5_SROA_IDX]], align 8
|
|
; CHECK-NEXT: [[I_SROA_0_0_I6_SROA_IDX:%.*]] = getelementptr inbounds [[TMP0]], %0* [[I2]], i64 0, i32 0
|
|
; CHECK-NEXT: store i32* [[I1_SROA_0_0_COPYLOAD]], i32** [[I_SROA_0_0_I6_SROA_IDX]], align 8
|
|
; CHECK-NEXT: tail call void @_Z7escape01S(%0* nonnull byval(%0) align 8 [[I2]])
|
|
; CHECK-NEXT: ret i32* [[I1_SROA_0_0_COPYLOAD]]
|
|
;
|
|
bb:
|
|
%i = alloca %0, align 8
|
|
%i1 = alloca %0, align 8
|
|
%i2 = alloca %0, align 8
|
|
%i3 = bitcast %0* %i to i8*
|
|
call void @llvm.lifetime.start.p0i8(i64 24, i8* %i3)
|
|
%i4 = bitcast %0* %i1 to i8*
|
|
%i5 = bitcast %0* %arg to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %i4, i8* align 8 %i5, i64 24, i1 false)
|
|
call void @_Z3gen1S(%0* sret(%0) align 8 %i, %0* byval(%0) align 8 %i1)
|
|
%i6 = bitcast %0* %i2 to i8*
|
|
%i7 = bitcast %0* %i to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %i6, i8* align 8 %i7, i64 24, i1 false)
|
|
call void @_Z7escape01S(%0* byval(%0) align 8 %i2)
|
|
%i8 = getelementptr inbounds %0, %0* %i, i32 0, i32 0
|
|
%i9 = load i32*, i32** %i8, align 8
|
|
%i10 = bitcast %0* %i to i8*
|
|
call void @llvm.lifetime.end.p0i8(i64 24, i8* %i10)
|
|
ret i32* %i9
|
|
}
|
|
|
|
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
|
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
|
|
|
|
declare dso_local void @_Z7escape01S(%0* byval(%0) align 8)
|
|
|
|
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
|
|
|
|
define dso_local i32* @_Z3bar1S(%0* byval(%0) align 8 %arg) {
|
|
; CHECK-LABEL: @_Z3bar1S(
|
|
; CHECK-NEXT: bb:
|
|
; CHECK-NEXT: [[I1_SROA_0_0_I4_SROA_IDX:%.*]] = getelementptr inbounds [[TMP0:%.*]], %0* [[ARG:%.*]], i64 0, i32 0
|
|
; CHECK-NEXT: [[I1_SROA_0_0_COPYLOAD:%.*]] = load i32*, i32** [[I1_SROA_0_0_I4_SROA_IDX]], align 8
|
|
; CHECK-NEXT: [[I5:%.*]] = tail call i32 @_Z4condv()
|
|
; CHECK-NEXT: [[I6_NOT:%.*]] = icmp eq i32 [[I5]], 0
|
|
; CHECK-NEXT: br i1 [[I6_NOT]], label [[BB10:%.*]], label [[BB7:%.*]]
|
|
; CHECK: bb7:
|
|
; CHECK-NEXT: tail call void @_Z5sync0v()
|
|
; CHECK-NEXT: tail call void @_Z7escape0Pi(i32* [[I1_SROA_0_0_COPYLOAD]])
|
|
; CHECK-NEXT: br label [[BB13:%.*]]
|
|
; CHECK: bb10:
|
|
; CHECK-NEXT: tail call void @_Z5sync1v()
|
|
; CHECK-NEXT: tail call void @_Z7escape1Pi(i32* [[I1_SROA_0_0_COPYLOAD]])
|
|
; CHECK-NEXT: br label [[BB13]]
|
|
; CHECK: bb13:
|
|
; CHECK-NEXT: ret i32* [[I1_SROA_0_0_COPYLOAD]]
|
|
;
|
|
bb:
|
|
%i = alloca %0, align 8
|
|
%i1 = alloca %0, align 8
|
|
%i2 = bitcast %0* %i to i8*
|
|
call void @llvm.lifetime.start.p0i8(i64 24, i8* %i2)
|
|
%i3 = bitcast %0* %i1 to i8*
|
|
%i4 = bitcast %0* %arg to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %i3, i8* align 8 %i4, i64 24, i1 false)
|
|
call void @_Z3gen1S(%0* sret(%0) align 8 %i, %0* byval(%0) align 8 %i1)
|
|
%i5 = call i32 @_Z4condv()
|
|
%i6 = icmp ne i32 %i5, 0
|
|
br i1 %i6, label %bb7, label %bb10
|
|
|
|
bb7:
|
|
call void @_Z5sync0v()
|
|
%i8 = getelementptr inbounds %0, %0* %i, i32 0, i32 0
|
|
%i9 = load i32*, i32** %i8, align 8
|
|
call void @_Z7escape0Pi(i32* %i9)
|
|
br label %bb13
|
|
|
|
bb10:
|
|
call void @_Z5sync1v()
|
|
%i11 = getelementptr inbounds %0, %0* %i, i32 0, i32 0
|
|
%i12 = load i32*, i32** %i11, align 8
|
|
call void @_Z7escape1Pi(i32* %i12)
|
|
br label %bb13
|
|
|
|
bb13:
|
|
%i14 = getelementptr inbounds %0, %0* %i, i32 0, i32 0
|
|
%i15 = load i32*, i32** %i14, align 8
|
|
%i16 = bitcast %0* %i to i8*
|
|
call void @llvm.lifetime.end.p0i8(i64 24, i8* %i16)
|
|
ret i32* %i15
|
|
}
|
|
|
|
declare dso_local i32 @_Z4condv()
|
|
declare dso_local void @_Z5sync0v()
|
|
declare dso_local void @_Z7escape0Pi(i32*)
|
|
declare dso_local void @_Z5sync1v()
|
|
declare dso_local void @_Z7escape1Pi(i32*)
|