--- /dev/null
+#!/usr/bin/python
+
+# Auto-generates an exhaustive and repetitive test for correct bundle-locked
+# alignment on x86.
+# For every possible offset in an aligned bundle, a bundle-locked group of every
+# size in the inclusive range [1, bundle_size] is inserted. An appropriate CHECK
+# is added to verify that NOP padding occurred (or did not occur) as expected.
+
+# This script runs with Python 2.6+ (including 3.x)
+
+from __future__ import print_function
+
+BUNDLE_SIZE_POW2 = 4
+BUNDLE_SIZE = 2 ** BUNDLE_SIZE_POW2
+
+PREAMBLE = '''
+# RUN: llvm-mc -filetype=obj -triple i386-pc-linux-gnu %s -o - \\
+# RUN: | llvm-objdump -triple i386 -disassemble -no-show-raw-insn - | FileCheck %s
+
+# !!! This test is auto-generated from utils/testgen/mc-bundling-x86-gen.py !!!
+# It tests that bundle-aligned grouping works correctly in MC. Read the
+# source of the script for more details.
+
+ .text
+ .bundle_align_mode {0}
+'''.format(BUNDLE_SIZE_POW2).lstrip()
+
+ALIGNTO = ' .align {0}, 0x90'
+NOPFILL = ' .fill {0}, 1, 0x90'
+
+def print_bundle_locked_sequence(len):
+ print(' .bundle_lock')
+ print(' .rept {0}'.format(len))
+ print(' inc %eax')
+ print(' .endr')
+ print(' .bundle_unlock')
+
+def generate():
+ print(PREAMBLE)
+
+ ntest = 0
+ for instlen in range(1, BUNDLE_SIZE + 1):
+ for offset in range(0, BUNDLE_SIZE):
+ # Spread out all the instructions to not worry about cross-bundle
+ # interference.
+ print(ALIGNTO.format(2 * BUNDLE_SIZE))
+ print('INSTRLEN_{0}_OFFSET_{1}:'.format(instlen, offset))
+ if offset > 0:
+ print(NOPFILL.format(offset))
+ print_bundle_locked_sequence(instlen)
+
+ # Now generate an appropriate CHECK line
+ base_offset = ntest * 2 * BUNDLE_SIZE
+ inst_orig_offset = base_offset + offset # had it not been padded...
+
+ if offset + instlen > BUNDLE_SIZE:
+ # Padding needed
+ print('# CHECK: {0:x}: nop'.format(inst_orig_offset))
+ aligned_offset = (inst_orig_offset + instlen) & ~(BUNDLE_SIZE - 1)
+ print('# CHECK: {0:x}: incl'.format(aligned_offset))
+ else:
+ # No padding needed
+ print('# CHECK: {0:x}: incl'.format(inst_orig_offset))
+
+ print()
+ ntest += 1
+
+if __name__ == '__main__':
+ generate()
+
projects / oota-llvm.git / commitdiff