| ; Test that the set of used phys regs used by interprocedural register | |
| ; allocation is correct for a test case where the called function (@fn2) | |
| ; itself has a call (to @fn1). @fn1 defines %r0l, while @fn2 defines | |
| ; %r0d. The RegUsageInfo for @fn2 must include %r0h. | |
| ; | |
| ; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -enable-ipra -print-regusage 2>&1 < %s \ | |
| ; RUN: | FileCheck %s | |
| ; | |
| ; CHECK: fn2 Clobbered Registers: {{.*}} $r0h | |
| @h = external global [0 x i32], align 4 | |
| @n = external global i32*, align 8 | |
| define void @fn1() { | |
| bb: | |
| br label %bb1 | |
| bb1: ; preds = %bb1, %bb | |
| %tmp = getelementptr inbounds [0 x i32], [0 x i32]* @h, i64 0, i64 undef | |
| %tmp2 = load i32, i32* %tmp | |
| store i32 %tmp2, i32* undef | |
| br label %bb1 | |
| } | |
| define void @fn2() { | |
| bb: | |
| br label %bb1 | |
| bb1: ; preds = %bb | |
| br i1 undef, label %bb2, label %bb3 | |
| bb2: ; preds = %bb1 | |
| store i32* null, i32** @n | |
| unreachable | |
| bb3: ; preds = %bb1 | |
| call void @fn1() | |
| unreachable | |
| } | |
| define void @main() { | |
| bb: | |
| call void @fn2() | |
| ret void | |
| } |