[gc.statepoint] Change gc.statepoint intrinsic's return type to token type instead of i32 type
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
llvm-svn: 256443
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-8.ll b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-8.ll
index b89be7d..e5ef42d 100644
--- a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-8.ll
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-8.ll
@@ -24,7 +24,7 @@
loop_back:
%next_element_ptr = getelementptr i64 addrspace(1)*, i64 addrspace(1)* addrspace(1)* %current_element_ptr, i32 1
%next_index = add i32 %index, 1
- %safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
+ %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @do_safepoint, i32 0, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
br label %loop_check
not_found:
@@ -35,4 +35,4 @@
}
declare void @do_safepoint()
-declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
\ No newline at end of file
+declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
\ No newline at end of file