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0a4cf978a7
There can be a need for some optimizations to get (base, offset) for any GC pointer. The base can be calculated by generating needed instructions as it is done by the RewriteStatepointsForGC::findBasePointer() function. The offset can be calculated in the same way. Though to not expose the base calculation and to make the offset calculation as simple as ptrtoint(derived_ptr) - ptrtoint(base_ptr), which is illegal outside RS4GC, this patch introduces 2 intrinsics: @llvm.experimental.gc.get.pointer.base(%derived_ptr) @llvm.experimental.gc.get.pointer.offset(%derived_ptr) These intrinsics are inlined by RS4GC along with generation of statepoint sequences. With these new intrinsics the GC parseable lowering for atomic memcpy intrinsics (6ec2c5e402a724ba99bce82a9cac7a3006d660f4) could be implemented as a separate pass. Reviewed By: reames Differential Revision: https://reviews.llvm.org/D100445
135 lines
11 KiB
LLVM
135 lines
11 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
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; Use instcombine to cleanup offset computation.
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; Use gvn to remove duplicate computation.
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; RUN: opt -passes=rewrite-statepoints-for-gc,gvn,instcombine -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128-p1:64:64"
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target triple = "x86_64-apple-macosx10.11.0"
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declare i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* readnone nocapture) nounwind readnone willreturn
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declare i8 addrspace(1)* addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1p1i8.p1p1i8(i8 addrspace(1)* addrspace(1)* readnone nocapture) nounwind readnone willreturn
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declare i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* readnone nocapture) nounwind readnone willreturn
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declare i64 @llvm.experimental.gc.get.pointer.offset.p1p1i8(i8 addrspace(1)* addrspace(1)* readnone nocapture) nounwind readnone willreturn
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declare void @foo() readonly
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define i8 addrspace(1)* addrspace(1)* @test_simple(i8 addrspace(1)* %obj1, i8 addrspace(1)* %obj2, i32 %len, i1 %c) gc "statepoint-example" {
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; CHECK-LABEL: define {{[^@]+}}@test_simple
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; CHECK-SAME: (i8 addrspace(1)* [[OBJ1:%.*]], i8 addrspace(1)* [[OBJ2:%.*]], i32 [[LEN:%.*]], i1 [[C:%.*]]) gc "statepoint-example" {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[OBJ1_12:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[OBJ1]], i64 12
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; CHECK-NEXT: [[OBJ2_16:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[OBJ2]], i64 16
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; CHECK-NEXT: [[OBJ_X_BASE1:%.*]] = select i1 [[C]], i8 addrspace(1)* [[OBJ1]], i8 addrspace(1)* [[OBJ2]], !is_base_value !0
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; CHECK-NEXT: [[OBJ_X:%.*]] = select i1 [[C]], i8 addrspace(1)* [[OBJ1_12]], i8 addrspace(1)* [[OBJ2_16]]
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; CHECK-NEXT: [[OBJ_Y_BASE:%.*]] = select i1 [[C]], i8 addrspace(1)* [[OBJ2]], i8 addrspace(1)* [[OBJ1]]
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; CHECK-NEXT: [[OBJ_Y:%.*]] = select i1 [[C]], i8 addrspace(1)* [[OBJ2_16]], i8 addrspace(1)* [[OBJ1_12]]
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; CHECK-NEXT: [[OBJ_YA:%.*]] = bitcast i8 addrspace(1)* [[OBJ_Y]] to i8 addrspace(1)* addrspace(1)*
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; CHECK-NEXT: [[OBJ_X_BASE1_INT:%.*]] = ptrtoint i8 addrspace(1)* [[OBJ_X_BASE1]] to i64
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; CHECK-NEXT: [[OBJ_X_INT:%.*]] = ptrtoint i8 addrspace(1)* [[OBJ_X]] to i64
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; CHECK-NEXT: [[OBJ_X_OFFSET:%.*]] = sub i64 [[OBJ_X_INT]], [[OBJ_X_BASE1_INT]]
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; CHECK-NEXT: [[OBJ_Y_BASE_CAST:%.*]] = bitcast i8 addrspace(1)* [[OBJ_Y_BASE]] to i8 addrspace(1)* addrspace(1)*
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; CHECK-NEXT: [[OBJ_Y_BASE_INT:%.*]] = ptrtoint i8 addrspace(1)* [[OBJ_Y_BASE]] to i64
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; CHECK-NEXT: [[OBJ_YA_INT:%.*]] = ptrtoint i8 addrspace(1)* [[OBJ_Y]] to i64
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; CHECK-NEXT: [[OBJ_YA_OFFSET:%.*]] = sub i64 [[OBJ_YA_INT]], [[OBJ_Y_BASE_INT]]
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; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* nonnull @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i8 addrspace(1)* [[OBJ_X_BASE1]], i64 [[OBJ_X_OFFSET]], i8 addrspace(1)* [[OBJ_X_BASE1]], i64 [[OBJ_X_OFFSET]], i8 addrspace(1)* addrspace(1)* [[OBJ_Y_BASE_CAST]], i64 [[OBJ_YA_OFFSET]]), "gc-live"(i8 addrspace(1)* addrspace(1)* [[OBJ_YA]], i8 addrspace(1)* [[OBJ_Y_BASE]]) ]
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; CHECK-NEXT: [[OBJ_YA_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 1, i32 0)
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; CHECK-NEXT: [[OBJ_YA_RELOCATED_CASTED:%.*]] = bitcast i8 addrspace(1)* [[OBJ_YA_RELOCATED]] to i8 addrspace(1)* addrspace(1)*
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; CHECK-NEXT: ret i8 addrspace(1)* addrspace(1)* [[OBJ_YA_RELOCATED_CASTED]]
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;
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entry:
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%obj1.12 = getelementptr inbounds i8, i8 addrspace(1)* %obj1, i64 12
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%obj2.16 = getelementptr inbounds i8, i8 addrspace(1)* %obj2, i64 16
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%obj.x = select i1 %c, i8 addrspace(1)* %obj1.12, i8 addrspace(1)* %obj2.16
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%obj.y = select i1 %c, i8 addrspace(1)* %obj2.16, i8 addrspace(1)* %obj1.12
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%obj.ya = bitcast i8 addrspace(1)* %obj.y to i8 addrspace(1)* addrspace(1)*
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%obj.x.base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x)
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%obj.x.offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x)
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%obj.x.base2 = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x)
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%obj.x.offset2 = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x)
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%obj.ya.base = call i8 addrspace(1)* addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1p1i8.p1p1i8(i8 addrspace(1)* addrspace(1)* %obj.ya)
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%obj.ya.offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1p1i8(i8 addrspace(1)* addrspace(1)* %obj.ya)
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call void @foo() readonly [
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"deopt"(i8 addrspace(1)* %obj.x.base, i64 %obj.x.offset, i8 addrspace(1)* %obj.x.base2, i64 %obj.x.offset2, i8 addrspace(1)* addrspace(1)* %obj.ya.base, i64 %obj.ya.offset) ]
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ret i8 addrspace(1)* addrspace(1)* %obj.ya
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}
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define void @test_base_of_base(i8 addrspace(1)* %obj1, i8 addrspace(1)* %obj2, i32 %len, i1 %c) gc "statepoint-example" {
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; CHECK-LABEL: define {{[^@]+}}@test_base_of_base
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; CHECK-SAME: (i8 addrspace(1)* [[OBJ1:%.*]], i8 addrspace(1)* [[OBJ2:%.*]], i32 [[LEN:%.*]], i1 [[C:%.*]]) gc "statepoint-example" {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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;
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entry:
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%obj1.12 = getelementptr inbounds i8, i8 addrspace(1)* %obj1, i64 12
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%obj2.16 = getelementptr inbounds i8, i8 addrspace(1)* %obj2, i64 16
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%obj.x = select i1 %c, i8 addrspace(1)* %obj1.12, i8 addrspace(1)* %obj2.16
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%obj.x.base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x)
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%obj.x.base_of_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base)
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ret void
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}
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define i8 addrspace(1)* @test_chained(i8 addrspace(1)* %obj1, i8 addrspace(1)* %obj2, i32 %len, i1 %c) gc "statepoint-example" {
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; CHECK-LABEL: define {{[^@]+}}@test_chained
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; CHECK-SAME: (i8 addrspace(1)* [[OBJ1:%.*]], i8 addrspace(1)* [[OBJ2:%.*]], i32 [[LEN:%.*]], i1 [[C:%.*]]) gc "statepoint-example" {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[OBJ_X_BASE1:%.*]] = select i1 [[C]], i8 addrspace(1)* [[OBJ1]], i8 addrspace(1)* [[OBJ2]], !is_base_value !0
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; CHECK-NEXT: [[OBJ_X_BASE_GEP:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[OBJ_X_BASE1]], i64 8
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; CHECK-NEXT: [[OBJ_X_BASE_OF_BASE_GEP:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[OBJ_X_BASE1]], i64 20
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; CHECK-NEXT: [[OBJ_X_BASE_OF_BASE_OF_BASE_GEP:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[OBJ_X_BASE1]], i64 24
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; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* nonnull @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i8 addrspace(1)* [[OBJ_X_BASE1]], i8 addrspace(1)* [[OBJ_X_BASE1]], i8 addrspace(1)* [[OBJ_X_BASE1]], i8 addrspace(1)* [[OBJ_X_BASE_GEP]], i8 addrspace(1)* [[OBJ_X_BASE_OF_BASE_GEP]], i8 addrspace(1)* [[OBJ_X_BASE_OF_BASE_OF_BASE_GEP]], i8 addrspace(1)* [[OBJ_X_BASE1]], i8 addrspace(1)* [[OBJ_X_BASE1]], i8 addrspace(1)* [[OBJ_X_BASE1]], i64 0, i64 0, i64 0, i64 8, i64 20, i64 24, i64 0, i64 0, i64 0), "gc-live"(i8 addrspace(1)* [[OBJ_X_BASE1]]) ]
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; CHECK-NEXT: [[OBJ_X_BASE1_RELOCATED:%.*]] = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token [[STATEPOINT_TOKEN]], i32 0, i32 0)
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; CHECK-NEXT: ret i8 addrspace(1)* [[OBJ_X_BASE1_RELOCATED]]
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;
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entry:
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%obj1.12 = getelementptr inbounds i8, i8 addrspace(1)* %obj1, i64 12
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%obj2.16 = getelementptr inbounds i8, i8 addrspace(1)* %obj2, i64 16
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%obj.x = select i1 %c, i8 addrspace(1)* %obj1.12, i8 addrspace(1)* %obj2.16
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%obj.x.base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x)
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%obj.x.base_of_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base)
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%obj.x.base_of_base_of_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base_of_base)
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%obj.x.base_gep = getelementptr inbounds i8, i8 addrspace(1)* %obj.x.base, i64 8
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%obj.x.base_of_base_gep = getelementptr inbounds i8, i8 addrspace(1)* %obj.x.base_of_base, i64 20
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%obj.x.base_of_base_of_base_gep = getelementptr inbounds i8, i8 addrspace(1)* %obj.x.base_of_base_of_base, i64 24
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%obj.x.base_gep_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base_gep)
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%obj.x.base_of_base_gep_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base_of_base_gep)
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%obj.x.base_of_base_of_base_gep_base = call i8 addrspace(1)* @llvm.experimental.gc.get.pointer.base.p1i8.p1i8(i8 addrspace(1)* %obj.x.base_of_base_of_base_gep)
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%obj.x.base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base)
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%obj.x.base_of_base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base)
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%obj.x.base_of_base_of_base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base_of_base)
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%obj.x.base_gep_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_gep)
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%obj.x.base_of_base_gep_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base_gep)
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%obj.x.base_of_base_of_base_gep_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base_of_base_gep)
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%obj.x.base_gep_base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_gep_base)
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%obj.x.base_of_base_gep_base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base_gep_base)
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%obj.x.base_of_base_of_base_gep_base_offset = call i64 @llvm.experimental.gc.get.pointer.offset.p1i8(i8 addrspace(1)* %obj.x.base_of_base_of_base_gep_base)
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call void @foo() readonly [
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"deopt"(
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i8 addrspace(1)* %obj.x.base,
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i8 addrspace(1)* %obj.x.base_of_base_of_base,
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i8 addrspace(1)* %obj.x.base_of_base,
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i8 addrspace(1)* %obj.x.base_gep,
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i8 addrspace(1)* %obj.x.base_of_base_gep,
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i8 addrspace(1)* %obj.x.base_of_base_of_base_gep,
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i8 addrspace(1)* %obj.x.base_gep_base,
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i8 addrspace(1)* %obj.x.base_of_base_gep_base,
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i8 addrspace(1)* %obj.x.base_of_base_of_base_gep_base,
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i64 %obj.x.base_offset,
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i64 %obj.x.base_of_base_offset,
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i64 %obj.x.base_of_base_of_base_offset,
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i64 %obj.x.base_gep_offset,
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i64 %obj.x.base_of_base_gep_offset,
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i64 %obj.x.base_of_base_of_base_gep_offset,
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i64 %obj.x.base_gep_base_offset,
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i64 %obj.x.base_of_base_gep_base_offset,
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i64 %obj.x.base_of_base_of_base_gep_base_offset) ]
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ret i8 addrspace(1)* %obj.x.base_of_base
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}
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