llvm.org GIT mirror llvm / 3400fc0
Merge 64364 from mainline. Fix a nasty bug (PR3550) where the inline pass could incorrectly mark calls with the tail marker when inlining them through an invoke. Patch, testcase, and perfect analysis by Jay Foad! git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_25@64520 91177308-0d34-0410-b5e6-96231b3b80d8 Tanya Lattner 11 years ago
2 changed file(s) with 37 addition(s) and 2 deletion(s). Raw diff Collapse all Expand all
202202 CalledFunc->getFunctionType()->isVarArg()) return false;
203203
204204
205 // If the call to the callee is a non-tail call, we must clear the 'tail'
205 // If the call to the callee is not a tail call, we must clear the 'tail'
206206 // flags on any calls that we inline.
207207 bool MustClearTailCallFlags =
208 isa(TheCall) && !cast(TheCall)->isTailCall();
208 !(isa(TheCall) && cast(TheCall)->isTailCall());
209209
210210 // If the call to the callee cannot throw, set the 'nounwind' flag on any
211211 // calls that we inline.
0 ; RUN: llvm-as < %s | opt -inline | llvm-dis | not grep {tail call void @llvm.memcpy.i32}
1 ; PR3550
2
3 define internal void @foo(i32* %p, i32* %q) {
4 %pp = bitcast i32* %p to i8*
5 %qq = bitcast i32* %q to i8*
6 tail call void @llvm.memcpy.i32(i8* %pp, i8* %qq, i32 4, i32 1)
7 ret void
8 }
9
10 declare void @llvm.memcpy.i32(i8* nocapture, i8* nocapture, i32, i32) nounwind
11
12 define i32 @main() {
13 %a = alloca i32 ; [#uses=3]
14 %b = alloca i32 ; [#uses=2]
15 store i32 1, i32* %a, align 4
16 store i32 0, i32* %b, align 4
17 invoke void @foo(i32* %a, i32* %b)
18 to label %invcont unwind label %lpad
19
20 invcont:
21 %retval = load i32* %a, align 4
22 ret i32 %retval
23
24 lpad:
25 %eh_ptr = call i8* @llvm.eh.exception()
26 %eh_select = call i32 (i8*, i8*, ...)* @llvm.eh.selector.i32(i8* %eh_ptr, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* null)
27 unreachable
28 }
29
30 declare i8* @llvm.eh.exception() nounwind
31
32 declare i32 @llvm.eh.selector.i32(i8*, i8*, ...) nounwind
33
34 declare i32 @__gxx_personality_v0(...)