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https://github.com/RPCSX/llvm.git
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955318d58d
Summary: This patch changes gc.statepoint intrinsic's return type to token type instead of i32 type. Using token types could prevent LLVM to merge different gc.statepoint nodes into PHI nodes and cause further problems with gc relocations. The patch also changes the way on how gc.relocate and gc.result look for their corresponding gc.statepoint on unwind path. The current implementation uses the selector value extracted from a { i8*, i32 } landingpad as a hook to find the gc.statepoint, while the patch directly uses a token type landingpad (http://reviews.llvm.org/D15405) to find the gc.statepoint.
Reviewers: sanjoy, JosephTremoulet, pgavlin, igor-laevsky, mjacob
Subscribers: reames, mjacob, sanjoy, llvm-commits
Differential Revision: http://reviews.llvm.org/D15662
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256443 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
2.3 KiB
LLVM
53 lines
2.3 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; These tests check the optimizations specific to
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; pointers being relocated at a statepoint.
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declare void @func()
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define i1 @test_negative(i32 addrspace(1)* %p) gc "statepoint-example" {
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entry:
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%safepoint_token = tail call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* %p)
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%pnew = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 7, i32 7)
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%cmp = icmp eq i32 addrspace(1)* %pnew, null
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ret i1 %cmp
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; CHECK-LABEL: test_negative
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; CHECK: %pnew = call i32 addrspace(1)*
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; CHECK: ret i1 %cmp
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}
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define i1 @test_nonnull(i32 addrspace(1)* nonnull %p) gc "statepoint-example" {
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entry:
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%safepoint_token = tail call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* %p)
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%pnew = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 7, i32 7)
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%cmp = icmp eq i32 addrspace(1)* %pnew, null
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ret i1 %cmp
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; CHECK-LABEL: test_nonnull
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; CHECK: ret i1 false
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}
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define i1 @test_null() gc "statepoint-example" {
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entry:
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%safepoint_token = tail call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* null)
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%pnew = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 7, i32 7)
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%cmp = icmp eq i32 addrspace(1)* %pnew, null
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ret i1 %cmp
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; CHECK-LABEL: test_null
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; CHECK-NOT: %pnew
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; CHECK: ret i1 true
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}
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define i1 @test_undef() gc "statepoint-example" {
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entry:
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%safepoint_token = tail call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* undef)
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%pnew = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 7, i32 7)
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%cmp = icmp eq i32 addrspace(1)* %pnew, null
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ret i1 %cmp
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; CHECK-LABEL: test_undef
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; CHECK-NOT: %pnew
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; CHECK: ret i1 undef
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}
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token, i32, i32) #3
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