Heejin Ahn d598826c8d [DAGCombiner] Fix a case of 1 in non-splat vector pow2 divisor ...

Summary:
D42479 (rL329525) enabled SDIV combine for pow2 non-splat vector
dividers. But when there is a 1 in a vector, the instruction sequence to
be generated involves shifting a value by the number of its bit widths,
which is undefined
(c64f4dbfe3/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (L6000-L6006)).

Especially, in architectures that do not support vector instructions,
each of element in a vector will be computed separately using scalar
operations, and then the resulting value will be undef for '1' values
in a vector.

(All 1's vector is fine; only vectors mixed with 1 and others will be
affected.)

Reviewers: RKSimon, jgravelle-google

Subscribers: jfb, dschuff, sbc100, jgravelle-google, llvm-commits

Differential Revision: https://reviews.llvm.org/D46161

llvm-svn: 331092

2018-04-27 22:23:11 +00:00

..

address-offsets.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

2017-02-28 23:37:04 +00:00

byval.ll

[WebAssembly] Use __stack_pointer global when writing wasm binary

2017-06-16 23:59:10 +00:00

call.ll

[WebAssembly] Reapply r319186: "Support bitcasted function addresses with varargs."

2017-12-08 21:27:00 +00:00

cfg-stackify.ll

[WebAssembly] Update cfg-stackify.ll to remove the workaround added in r318288.

2017-11-15 21:38:33 +00:00

cfi.ll

[WebAssembly] Basic support for Wasm object file encoding.

2017-02-24 23:18:00 +00:00

comparisons_f32.ll

[WebAssembly] Fix test expectations after r324274

2018-02-06 01:21:17 +00:00

comparisons_f64.ll

[WebAssembly] Fix test expectations after r324274

2018-02-06 01:21:17 +00:00

comparisons_i32.ll

[WebAssembly] Basic support for Wasm object file encoding.

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comparisons_i64.ll

[WebAssembly] Basic support for Wasm object file encoding.

2017-02-24 23:18:00 +00:00

conv-trap.ll

[WebAssembly] Fix fptoui lowering bounds

2017-11-29 20:20:11 +00:00

conv.ll

[WebAssembly] Fix trapping behavior in fptosi/fptoui.

2017-11-28 01:13:40 +00:00

copysign-casts.ll

[WebAssembly] Basic support for Wasm object file encoding.

2017-02-24 23:18:00 +00:00

cpus.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

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custom-sections.ll

[WebAssembly] Allow for the creation of user-defined custom sections

2018-04-05 17:01:39 +00:00

dbgvalue.ll

[WebAssembly] Switch to *-wasm as the default target triple.

2018-01-23 16:55:44 +00:00

dead-vreg.ll

[WebAssembly] Basic support for Wasm object file encoding.

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divrem-constant.ll

[WebAssembly] Basic support for Wasm object file encoding.

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exception.ll

[WebAssembly] Add support for exception handling instructions

2017-06-30 00:43:15 +00:00

f16.ll

[WebAssembly] Handle f16 in fast-isel.

2017-02-24 21:05:35 +00:00

f32.ll

[WebAssembly] Basic support for Wasm object file encoding.

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f64.ll

[WebAssembly] Basic support for Wasm object file encoding.

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fast-isel-i24.ll

[WebAssembly] Teach fast-isel to gracefully recover from illegal return types.

2018-04-17 20:46:42 +00:00

fast-isel-noreg.ll

[WebAssembly] Handle errors better in fast-isel.

2017-11-28 05:36:42 +00:00

fast-isel.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

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frem.ll

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func.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

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function-bitcasts-varargs.ll

[WebAssembly] Reapply r319186: "Support bitcasted function addresses with varargs."

2017-12-08 21:27:00 +00:00

function-bitcasts.ll

[WebAssembly] Reapply r319186: "Support bitcasted function addresses with varargs."

2017-12-08 21:27:00 +00:00

global.ll

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

globl.ll

[WebAssembly] Don't emit .import_global for the wasm target.

2017-12-05 17:21:57 +00:00

i32-load-store-alignment.ll

[WebAssembly] Add the rest of the atomic loads

2017-10-05 21:18:42 +00:00

i32.ll

[WebAssembly] Basic support for Wasm object file encoding.

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i64-load-store-alignment.ll

[WebAssembly] Add the rest of the atomic loads

2017-10-05 21:18:42 +00:00

i64.ll

[WebAssembly] Basic support for Wasm object file encoding.

2017-02-24 23:18:00 +00:00

i128-returned.ll

[SelectionDAG]: Ignore "returned" in the presence of an implicit sret.

2018-01-30 00:14:40 +00:00

i128.ll

[WebAssembly] Basic support for Wasm object file encoding.

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ident.ll

[WebAssembly] Basic support for Wasm object file encoding.

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immediates.ll

[WebAssembly] Basic support for Wasm object file encoding.

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implicit-def.ll

[WebAssembly] Switch to *-wasm as the default target triple.

2018-01-23 16:55:44 +00:00

import-module.ll

[WebAssembly] Add mechanisms for specifying an explicit import module name.

2018-02-09 23:13:22 +00:00

indirect-import.ll

[wasm] Update two tests for r308025 which causes scheduling changes due

2017-07-15 15:44:36 +00:00

inline-asm-m.ll

[WebAssembly] Add a test for inline-asm "m" constraints.

2017-11-08 19:37:24 +00:00

inline-asm.ll

[WebAssembly] Revise the strategy for inline asm.

2017-11-08 19:18:08 +00:00

irreducible-cfg.ll

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2017-02-28 23:37:04 +00:00

legalize.ll

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libcalls.ll

[WebAssembly] Fix libcall signature lookup

2018-01-19 17:45:54 +00:00

lit.local.cfg

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load-ext-atomic.ll

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2018-01-19 17:16:24 +00:00

load-ext.ll

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load-store-i1.ll

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load.ll

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lower-em-ehsjlj-options.ll

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lower-em-exceptions-whitelist.ll

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lower-em-exceptions.ll

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lower-em-sjlj.ll

[WebAssembly] Basic support for Wasm object file encoding.

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lower-global-dtors.ll

[WebAssembly] Implement @llvm.global_ctors and @llvm.global_dtors

2017-12-15 00:17:10 +00:00

main-declaration.ll

[WebAssemby] Re-apply r320041: "Support main functions with alternate signatures."

2017-12-08 21:18:21 +00:00

main.ll

[WebAssemby] Re-apply r320041: "Support main functions with alternate signatures."

2017-12-08 21:18:21 +00:00

mem-intrinsics.ll

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

memory-addr32.ll

[WebAssembly] Add mem.* intrinsics.

2018-01-23 17:02:02 +00:00

negative-base-reg.ll

[wasm] Fix test after r304117.

2017-05-29 16:32:52 +00:00

non-executable-stack.ll

[WebAssembly] Basic support for Wasm object file encoding.

2017-02-24 23:18:00 +00:00

offset-atomics.ll

[WebAssembly] Make sign-extension opcodes a distinct feature.

2018-01-19 17:16:24 +00:00

offset-fastisel.ll

[WebAssembly] WebAssemblyFastISel getelementptr variable index support

2017-06-22 21:26:08 +00:00

offset-folding.ll

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offset.ll

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phi.ll

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reg-stackify.ll

[WebAssembly] Remove infinite loop from reg-stackify test

2017-08-16 00:49:44 +00:00

return-int32.ll

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return-void.ll

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returned.ll

[WebAssembly] Fix WebAssemblyOptimizeReturned after r300367

2017-04-17 21:40:28 +00:00

select.ll

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signext-arg.ll

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2018-01-23 16:55:44 +00:00

signext-inreg.ll

[WebAssembly] Make sign-extension opcodes a distinct feature.

2018-01-19 17:16:24 +00:00

signext-zeroext.ll

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simd-arith.ll

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stack-alignment.ll

[WebAssembly] Remove WASM_STACK_POINTER.

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store-trunc.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

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store.ll

[WebAssembly] Basic support for Wasm object file encoding.

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switch.ll

[WebAssembly] Basic support for Wasm object file encoding.

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tls.ll

[WebAssembly] Strip threadlocal attribute from globals in single thread mode

2018-03-20 22:01:32 +00:00

umulo-i64.ll

[WebAssembly] Switch to *-wasm as the default target triple.

2018-01-23 16:55:44 +00:00

unreachable.ll

[WebAssembly] Basic support for Wasm object file encoding.

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unsupported-function-bitcasts.ll

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unused-argument.ll

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userstack.ll

Revert r308273 to reinstate part of r308100.

2017-07-19 04:15:30 +00:00

varargs.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

2017-02-28 23:37:04 +00:00

vector_sdiv.ll

[DAGCombiner] Fix a case of 1 in non-splat vector pow2 divisor

2018-04-27 22:23:11 +00:00

vtable.ll

[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

2017-02-28 23:37:04 +00:00