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| ; 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
}
|