1# Test cases where we spill from one frame index to another, both of which 2# are out of range of MVC, and both of which need emergency spill slots. 3# RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s 4 5# CHECK: f1: 6# CHECK: %fallthru 7# CHECK-DAG: stg [[REG1:%r[0-9]+]], 8168(%r15) 8# CHECK-DAG: stg [[REG2:%r[0-9]+]], 8176(%r15) 9# CHECK-DAG: lay [[REG3:%r[0-9]+]], 8192(%r15) 10# CHECK-DAG: lay [[REG4:%r[0-9]+]], 4096(%r15) 11# CHECK: mvc 0(8,[[REG3]]), 4088([[REG4]]) 12# CHECK-DAG: lg [[REG1]], 8168(%r15) 13# CHECK-DAG: lg [[REG2]], 8176(%r15) 14# CHECK: %skip 15# CHECK: br %r14 16 17# Arrange for %foo's spill slot to be at 8184(%r15) and the alloca area to be at 18# 8192(%r15). The two emergency spill slots live below that, so this requires 19# the first 8168 bytes to be used for the call. 160 of these bytes are 20# allocated for the ABI frame. There are also 5 argument registers, one of 21# which is used as a base pointer. 22args = (8168 - 160) / 8 + (5 - 1) 23 24print 'declare i64 *@foo(i64 *%s)' % (', i64' * args) 25print 'declare void @bar(i64 *)' 26print '' 27print 'define i64 @f1(i64 %foo) {' 28print 'entry:' 29 30# Make the allocation big, so that it goes at the top of the frame. 31print ' %array = alloca [1000 x i64]' 32print ' %area = getelementptr [1000 x i64], [1000 x i64] *%array, i64 0, i64 0' 33print ' %%base = call i64 *@foo(i64 *%%area%s)' % (', i64 0' * args) 34print '' 35 36# Make sure all GPRs are used. One is needed for the stack pointer and 37# another for %base, so we need 14 live values. 38count = 14 39for i in range(count): 40 print ' %%ptr%d = getelementptr i64, i64 *%%base, i64 %d' % (i, i / 2) 41 print ' %%val%d = load volatile i64 , i64 *%%ptr%d' % (i, i) 42 print '' 43 44# Encourage the register allocator to give preference to these %vals 45# by using them several times. 46for j in range(4): 47 for i in range(count): 48 print ' store volatile i64 %%val%d, i64 *%%ptr%d' % (i, i) 49 print '' 50 51# Copy the incoming argument, which we expect to be spilled, to the frame 52# index for the alloca area. Also throw in a volatile store, so that this 53# block cannot be reordered with the surrounding code. 54print ' %cond = icmp eq i64 %val0, %val1' 55print ' br i1 %cond, label %skip, label %fallthru' 56print '' 57print 'fallthru:' 58print ' store i64 %foo, i64 *%area' 59print ' store volatile i64 %val0, i64 *%ptr0' 60print ' br label %skip' 61print '' 62print 'skip:' 63 64# Use each %val a few more times to emphasise the point, and to make sure 65# that they are live across the store of %foo. 66for j in range(4): 67 for i in range(count): 68 print ' store volatile i64 %%val%d, i64 *%%ptr%d' % (i, i) 69 print '' 70 71print ' call void @bar(i64 *%area)' 72print ' ret i64 0' 73print '}' 74