Ranjeet Singh d530427b4a Fix signed multiplication with overflow fallback. ...

For targets that don't have ISD::MULHS or ISD::SMUL_LOHI for the type
and the double width type is illegal, then the two operands are
sign extended to twice their size then multiplied to check for overflow.
The extended upper halves were mismatched causing an incorrect result.
This fixes the mismatch.

A test was added for ARM V6-M where the bug was detected.

Patch by James Duley.

Differential Revision: https://reviews.llvm.org/D31807



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301404 91177308-0d34-0410-b5e6-96231b3b80d8

2017-04-26 13:41:43 +00:00

..

Analysis

[IVUsers] Don't bail out of normalizing non-affine add recs

2017-04-25 06:53:25 +00:00

Assembler

Allow DataLayout to specify addrspace for allocas.

2017-04-10 22:27:50 +00:00

Bindings

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Bitcode

PR32382: Fix emitting complex DWARF expressions.

2017-04-18 01:21:53 +00:00

BugPoint

llvm/test/BugPoint/compile-custom.ll: Use %/s for its path not to be mis-escaped.

2017-04-13 11:40:32 +00:00

CodeGen

Fix signed multiplication with overflow fallback.

2017-04-26 13:41:43 +00:00

DebugInfo

[llvm-pdbdump] Dump File / Line Info to YAML.

2017-04-25 20:22:02 +00:00

Examples

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ExecutionEngine

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Feature

[GVNHoist] Re-enable GVNHoist by default

2017-04-11 14:36:30 +00:00

FileCheck

[FileCheck] Added --enable-var-scope option to enable scope for regex variables.

2017-03-09 17:59:04 +00:00

Instrumentation

[asan] Let the frontend disable gc-sections optimization for asan globals.

2017-04-24 19:34:13 +00:00

Integer

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JitListener

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LibDriver

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Linker

[Linker] Provide callback for internalization

2017-03-13 18:08:11 +00:00

LTO

Object, LTO: Add target triple to irsymtab and LTO API.

2017-04-14 02:55:06 +00:00

MC

[X86][SSE2] Fix asm string for movq (Move Quadword) instruction.

2017-04-26 07:08:44 +00:00

Object

[llvm-ar] errors go on stderr and not on stdout.

2017-04-05 14:52:17 +00:00

ObjectYAML

[WebAssembly] Allow for signed relocation addends

2017-04-26 00:02:31 +00:00

Other

Simplify the CFG after loop pass cleanup.

2017-04-26 12:02:41 +00:00

SymbolRewriter

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TableGen

[globalisel][tablegen] Add support for RegisterOperand.

2017-04-22 15:53:21 +00:00

ThinLTO/X86

Bitcode: Add a string table to the bitcode format.

2017-04-17 17:51:36 +00:00

tools

[gcov] Sort file info before printing it

2017-04-26 00:16:10 +00:00

Transforms

[InstCombine] Add test cases for opportunities to improve knownbits handling for cttz and ctlz intrinsics.

2017-04-26 05:59:19 +00:00

Unit

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Verifier

Verifier: Check some amdgpu calling convention restrictions

2017-04-04 18:43:11 +00:00

YAMLParser

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.clang-format

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CMakeLists.txt

Add a dependency from llvm/test to llvm-cvtres.

2017-04-21 20:45:11 +00:00

lit.cfg

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lit.site.cfg.in

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TestRunner.sh

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