| ; 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 |
| } |
