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llvm-project/llvm/test/CodeGen/X86/longlong-deadload.ll

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Fix old testcase for dead store to match the original intent. The x86 backend has a special case for load+xor+store, which isn't really what this is trying to test. llvm-svn: 296077
2017-02-24 10:58:49 +08:00
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-pc-linux-gnu | FileCheck %s
; FIXME: This should not load or store the top part of *P.
Make load->store deletion a bit smarter. This allows us to compile this: void test(long long *P) { *P ^= 1; } into just: _test: movl 4(%esp), %eax xorl $1, (%eax) ret instead of code like this: _test: movl 4(%esp), %ecx xorl $1, (%ecx) movl 4(%ecx), %edx movl %edx, 4(%ecx) ret llvm-svn: 45762
2008-01-09 07:08:06 +08:00
define void @test(i64* %P) nounwind {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test:
[CodeGen] Unify MBB reference format in both MIR and debug output As part of the unification of the debug format and the MIR format, print MBB references as '%bb.5'. The MIR printer prints the IR name of a MBB only for block definitions. * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g' * find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g' * grep -nr 'BB#' and fix Differential Revision: https://reviews.llvm.org/D40422 llvm-svn: 319665
2017-12-05 01:18:51 +08:00
; CHECK: # %bb.0:
Fix old testcase for dead store to match the original intent. The x86 backend has a special case for load+xor+store, which isn't really what this is trying to test. llvm-svn: 296077
2017-02-24 10:58:49 +08:00
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT: movl (%eax), %ecx
; CHECK-NEXT: xorl $1, %ecx
; CHECK-NEXT: orl $2, %ecx
; CHECK-NEXT: movl %ecx, (%eax)
; CHECK-NEXT: retl
%tmp1 = load i64, i64* %P, align 8
%tmp2 = xor i64 %tmp1, 1
%tmp3 = or i64 %tmp2, 2
store i64 %tmp3, i64* %P, align 8
ret void
Make load->store deletion a bit smarter. This allows us to compile this: void test(long long *P) { *P ^= 1; } into just: _test: movl 4(%esp), %eax xorl $1, (%eax) ret instead of code like this: _test: movl 4(%esp), %ecx xorl $1, (%ecx) movl 4(%ecx), %edx movl %edx, 4(%ecx) ret llvm-svn: 45762
2008-01-09 07:08:06 +08:00
}