Keno Fischer cc80af1b4f [FastIsel][X86] Fix invalid register replacement for bool args ... Summary: Consider the following IR: %3 = load i8* undef %4 = trunc i8 %3 to i1 %5 = call %jl_value_t.0* @foo(..., i1 %4, ...) ret %jl_value_t.0* %5 Bools (that are the result of direct truncs) are lowered as whatever the argument to the trunc was and a "and 1", causing the part of the MBB responsible for this argument to look something like this: %vreg8<def,tied1> = AND8ri %vreg7<kill,tied0>, 1, %EFLAGS<imp-def>; GR8:%vreg8,%vreg7 Later, when the load is lowered, it will insert %vreg15<def> = MOV8rm %vreg14, 1, %noreg, 0, %noreg; mem:LD1[undef] GR8:%vreg15 GR64:%vreg14 but remember to (at the end of isel) replace vreg7 by vreg15. Now for the bug. In fast isel lowering, we mistakenly mark vreg8 as the result of the load instead of the trunc. This adds a fixup to have vreg8 replaced by whatever the result of the load is as well, so we end up with %vreg15<def,tied1> = AND8ri %vreg15<kill,tied0>, 1, %EFLAGS<imp-def>; GR8:%vreg15 which is an SSA violation and causes problems later down the road. This fixes PR21557. Test Plan: Test test case from PR21557 is added to the test suite. Reviewers: ributzka Reviewed By: ributzka Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D6245 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224884 91177308-0d34-0410-b5e6-96231b3b80d8		2014-12-27 13:10:15 +00:00
..
Analysis
Assembler
Bindings	[OCaml] PR21901: Update tests.	2014-12-24 01:58:45 +00:00
Bitcode
BugPoint
CodeGen	[FastIsel][X86] Fix invalid register replacement for bool args	2014-12-27 13:10:15 +00:00
DebugInfo	Band-aid fix for PR22032: don't emit DWARF debug info if AddressSanitizer is enabled on Windows	2014-12-26 17:00:51 +00:00
ExecutionEngine
Feature
FileCheck
Instrumentation	[asan] change the coverage collection scheme so that we can easily emit coverage for the entire process as a single bit set, and if coverage_bitset=1 actually emit that bitset	2014-12-23 22:32:17 +00:00
Integer
JitListener
Linker
LTO
MC	Convert test to llvm-readobj. NFC.	2014-12-26 22:47:39 +00:00
Object	[Object] Don't crash on empty export lists.	2014-12-19 02:31:01 +00:00
Other
SymbolRewriter
TableGen
tools	Add printing the LC_THREAD load commands with llvm-objdump’s -private-headers.	2014-12-23 22:56:39 +00:00
Transforms	InstCombine: Infer nuw for multiplies	2014-12-26 09:50:35 +00:00
Unit
Verifier
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh