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llvm-project/llvm/test/CodeGen/WebAssembly/dead-vreg.ll

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[WebAssembly] Reintroduce ARGUMENT moving logic Reinteroduce the code for moving ARGUMENTS back to the top of the basic block. While the ARGUMENTS physical register prevents sinking and scheduling from moving them, it does not appear to be sufficient to prevent SelectionDAG from moving them down in the initial schedule. This patch introduces a patch that moves them back to the top immediately after SelectionDAG runs. This is still hopefully a temporary solution. http://reviews.llvm.org/D14750 is one alternative, though the review has not been favorable, and proposed alternatives are longer-term and have other downsides. This fixes the main outstanding -verify-machineinstrs failures, so it adds -verify-machineinstrs to several tests. Differential Revision: http://reviews.llvm.org/D15377 llvm-svn: 255125
2015-12-10 00:23:59 +08:00
; RUN: llc < %s -asm-verbose=false -verify-machineinstrs | FileCheck %s
WebAssembly: don't omit dead vregs from locals Summary: This is a temporary hack until we get around to remapping the vreg numbers to local numbers. Dead vregs cause bad numbering and make consumers sad. We could also just look at debug info an use named locals instead, but vregs have to work properly anyways so there! Reviewers: binji, sunfish Subscribers: jfb, llvm-commits, dschuff Differential Revision: http://reviews.llvm.org/D13839 llvm-svn: 250594
2015-10-17 08:25:38 +08:00
[WebAssembly] Reapply r252858, with svn add for the new file. Switch to MC for instruction printing. This encompasses several changes which are all interconnected: - Use the MC framework for printing almost all instructions. - AsmStrings are now live. - This introduces an indirection between LLVM vregs and WebAssembly registers, and a new pass, WebAssemblyRegNumbering, for computing a basic the mapping. This addresses some basic issues with argument registers and unused registers. - The way ARGUMENT instructions are handled no longer generates redundant get_local+set_local for every argument. This also changes the assembly syntax somewhat; most notably, MC's printing does not use sigils on label names, so those are no longer present, and push/pop now have a sigil to keep them unambiguous. The usage of set_local/get_local/$push/$pop will continue to evolve significantly. This patch is just one step of a larger change. llvm-svn: 252910
2015-11-13 01:04:33 +08:00
; Check that unused vregs aren't assigned registers.
WebAssembly: don't omit dead vregs from locals Summary: This is a temporary hack until we get around to remapping the vreg numbers to local numbers. Dead vregs cause bad numbering and make consumers sad. We could also just look at debug info an use named locals instead, but vregs have to work properly anyways so there! Reviewers: binji, sunfish Subscribers: jfb, llvm-commits, dschuff Differential Revision: http://reviews.llvm.org/D13839 llvm-svn: 250594
2015-10-17 08:25:38 +08:00
[WebAssembly] Add -m:e to the target triple. This enables ELF-style name mangling, which primarily means using ".L" for private symbols. llvm-svn: 257020
2016-01-07 11:19:23 +08:00
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
[WebAsembly] Update default triple in test files to wasm32-unknown-unkown. Summary: The final -wasm component has been the default for some time now. Subscribers: jfb, dschuff, jgravelle-google, eraman, aheejin, JDevlieghere, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D46342 llvm-svn: 332007
2018-05-11 01:49:11 +08:00
target triple = "wasm32-unknown-unknown"
WebAssembly: don't omit dead vregs from locals Summary: This is a temporary hack until we get around to remapping the vreg numbers to local numbers. Dead vregs cause bad numbering and make consumers sad. We could also just look at debug info an use named locals instead, but vregs have to work properly anyways so there! Reviewers: binji, sunfish Subscribers: jfb, llvm-commits, dschuff Differential Revision: http://reviews.llvm.org/D13839 llvm-svn: 250594
2015-10-17 08:25:38 +08:00
define void @foo(i32* nocapture %a, i32 %w, i32 %h) {
; CHECK-LABEL: foo:
[WebAssembly] replaced .param/.result by .functype Summary: This makes it easier/cleaner to generate a single signature from this directive. Also: - Adds the symbol name, such that we don't depend on the location of this directive anymore. - Actually constructs the signature in the assembler, and make the assembler own it. - Refactor the use of MVT vs ValType in the streamer and assembler to require less conversions overall. - Changed 700 or so tests to use it. Reviewers: sbc100, dschuff Subscribers: jgravelle-google, eraman, aheejin, sunfish, jfb, llvm-commits Differential Revision: https://reviews.llvm.org/D54652 llvm-svn: 347228
2018-11-20 01:10:36 +08:00
; CHECK-NEXT: .functype foo (i32, i32, i32) -> (){{$}}
[WebAssembly] Rematerialize constants rather than hold them live in registers. Teach the register stackifier to rematerialize constants that have multiple uses instead of leaving them in registers. In the WebAssembly encoding, it's the same code size to materialize most constants as it is to read a value from a register. llvm-svn: 258142
2016-01-20 00:59:23 +08:00
; CHECK-NEXT: .local i32, i32, i32, i32, i32, i32{{$}}
WebAssembly: don't omit dead vregs from locals Summary: This is a temporary hack until we get around to remapping the vreg numbers to local numbers. Dead vregs cause bad numbering and make consumers sad. We could also just look at debug info an use named locals instead, but vregs have to work properly anyways so there! Reviewers: binji, sunfish Subscribers: jfb, llvm-commits, dschuff Differential Revision: http://reviews.llvm.org/D13839 llvm-svn: 250594
2015-10-17 08:25:38 +08:00
entry:
%cmp.19 = icmp sgt i32 %h, 0
br i1 %cmp.19, label %for.cond.1.preheader.lr.ph, label %for.end.7
for.cond.1.preheader.lr.ph:
%cmp2.17 = icmp sgt i32 %w, 0
br label %for.cond.1.preheader
for.cond.1.preheader:
%y.020 = phi i32 [ 0, %for.cond.1.preheader.lr.ph ], [ %inc6, %for.inc.5 ]
br i1 %cmp2.17, label %for.body.3.lr.ph, label %for.inc.5
for.body.3.lr.ph:
%mul4 = mul nsw i32 %y.020, %w
br label %for.body.3
for.body.3:
%x.018 = phi i32 [ 0, %for.body.3.lr.ph ], [ %inc, %for.body.3 ]
%mul = mul nsw i32 %x.018, %y.020
%add = add nsw i32 %x.018, %mul4
%arrayidx = getelementptr inbounds i32, i32* %a, i32 %add
store i32 %mul, i32* %arrayidx, align 4
%inc = add nuw nsw i32 %x.018, 1
%exitcond = icmp eq i32 %inc, %w
br i1 %exitcond, label %for.inc.5.loopexit, label %for.body.3
for.inc.5.loopexit:
br label %for.inc.5
for.inc.5:
%inc6 = add nuw nsw i32 %y.020, 1
%exitcond22 = icmp eq i32 %inc6, %h
br i1 %exitcond22, label %for.end.7.loopexit, label %for.cond.1.preheader
for.end.7.loopexit:
br label %for.end.7
for.end.7:
ret void
}