maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/segmented-stacks-dynamic.ll

89 lines
2.3 KiB
LLVM
Raw Normal View History

Move the segmented stack switch to a function attribute This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! llvm-svn: 205997
2014-04-11 06:58:43 +08:00
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -verify-machineinstrs | FileCheck %s -check-prefix=X32
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -verify-machineinstrs | FileCheck %s -check-prefix=X64
[x32] Fix segmented stacks support Summary: Update segmented-stacks*.ll tests with x32 target case and make corresponding changes to make them pass. Test Plan: tests updated with x32 target Reviewers: nadav, rafael, dschuff Subscribers: llvm-commits, zinovy.nis Differential Revision: http://reviews.llvm.org/D5245 llvm-svn: 218247
2014-09-22 21:11:35 +08:00
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -verify-machineinstrs | FileCheck %s -check-prefix=X32ABI
Move the segmented stack switch to a function attribute This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! llvm-svn: 205997
2014-04-11 06:58:43 +08:00
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -filetype=obj
[x32] Fix segmented stacks support Summary: Update segmented-stacks*.ll tests with x32 target case and make corresponding changes to make them pass. Test Plan: tests updated with x32 target Reviewers: nadav, rafael, dschuff Subscribers: llvm-commits, zinovy.nis Differential Revision: http://reviews.llvm.org/D5245 llvm-svn: 218247
2014-09-22 21:11:35 +08:00
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -filetype=obj
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; Just to prevent the alloca from being optimized away
declare void @dummy_use(i32*, i32)
Move the segmented stack switch to a function attribute This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! llvm-svn: 205997
2014-04-11 06:58:43 +08:00
define i32 @test_basic(i32 %l) #0 {
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
%mem = alloca i32, i32 %l
call void @dummy_use (i32* %mem, i32 %l)
%terminate = icmp eq i32 %l, 0
br i1 %terminate, label %true, label %false
true:
ret i32 0
false:
%newlen = sub i32 %l, 1
%retvalue = call i32 @test_basic(i32 %newlen)
ret i32 %retvalue
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
; X32-LABEL: test_basic:
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; X32: cmpl %gs:48, %esp
; X32-NEXT: ja .LBB0_2
; X32: pushl $4
; X32-NEXT: pushl $12
; X32-NEXT: calll __morestack
; X32-NEXT: ret
; X32: movl %esp, %eax
Enable MI Sched for x86. This changes the SelectionDAG scheduling preference to source order. Soon, the SelectionDAG scheduler can be bypassed saving a nice chunk of compile time. Performance differences that result from this change are often a consequence of register coalescing. The register coalescer is far from perfect. Bugs can be filed for deficiencies. On x86 SandyBridge/Haswell, the source order schedule is often preserved, particularly for small blocks. Register pressure is generally improved over the SD scheduler's ILP mode. However, we are still able to handle large blocks that require latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also attempts to discover the critical path in single-block loops and adjust heuristics accordingly. The MI scheduler relies on the new machine model. This is currently unimplemented for AVX, so we may not be generating the best code yet. Unit tests are updated so they don't depend on SD scheduling heuristics. llvm-svn: 192750
2013-10-16 07:33:07 +08:00
; X32: subl %ecx, %eax
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; X32-NEXT: cmpl %eax, %gs:48
; X32: movl %eax, %esp
; X32: subl $12, %esp
; X32-NEXT: pushl %ecx
; X32-NEXT: calll __morestack_allocate_stack_space
; X32-NEXT: addl $16, %esp
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
; X64-LABEL: test_basic:
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; X64: cmpq %fs:112, %rsp
; X64-NEXT: ja .LBB0_2
; X64: movabsq $24, %r10
; X64-NEXT: movabsq $0, %r11
; X64-NEXT: callq __morestack
; X64-NEXT: ret
Erase joined copies immediately. The late dead code elimination is no longer necessary. The test changes are cause by a register hint that can be either %rdi or %rax. The choice depends on the use list order, which this patch changes. llvm-svn: 157131
2012-05-20 04:54:07 +08:00
; X64: movq %rsp, %[[RDI:rdi|rax]]
Enable MI Sched for x86. This changes the SelectionDAG scheduling preference to source order. Soon, the SelectionDAG scheduler can be bypassed saving a nice chunk of compile time. Performance differences that result from this change are often a consequence of register coalescing. The register coalescer is far from perfect. Bugs can be filed for deficiencies. On x86 SandyBridge/Haswell, the source order schedule is often preserved, particularly for small blocks. Register pressure is generally improved over the SD scheduler's ILP mode. However, we are still able to handle large blocks that require latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also attempts to discover the critical path in single-block loops and adjust heuristics accordingly. The MI scheduler relies on the new machine model. This is currently unimplemented for AVX, so we may not be generating the best code yet. Unit tests are updated so they don't depend on SD scheduling heuristics. llvm-svn: 192750
2013-10-16 07:33:07 +08:00
; X64: subq %{{.*}}, %[[RDI]]
Erase joined copies immediately. The late dead code elimination is no longer necessary. The test changes are cause by a register hint that can be either %rdi or %rax. The choice depends on the use list order, which this patch changes. llvm-svn: 157131
2012-05-20 04:54:07 +08:00
; X64-NEXT: cmpq %[[RDI]], %fs:112
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
Erase joined copies immediately. The late dead code elimination is no longer necessary. The test changes are cause by a register hint that can be either %rdi or %rax. The choice depends on the use list order, which this patch changes. llvm-svn: 157131
2012-05-20 04:54:07 +08:00
; X64: movq %[[RDI]], %rsp
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
Erase joined copies immediately. The late dead code elimination is no longer necessary. The test changes are cause by a register hint that can be either %rdi or %rax. The choice depends on the use list order, which this patch changes. llvm-svn: 157131
2012-05-20 04:54:07 +08:00
; X64: movq %{{.*}}, %rdi
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; X64-NEXT: callq __morestack_allocate_stack_space
Erase joined copies immediately. The late dead code elimination is no longer necessary. The test changes are cause by a register hint that can be either %rdi or %rax. The choice depends on the use list order, which this patch changes. llvm-svn: 157131
2012-05-20 04:54:07 +08:00
; X64: movq %rax, %rdi
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
[x32] Fix segmented stacks support Summary: Update segmented-stacks*.ll tests with x32 target case and make corresponding changes to make them pass. Test Plan: tests updated with x32 target Reviewers: nadav, rafael, dschuff Subscribers: llvm-commits, zinovy.nis Differential Revision: http://reviews.llvm.org/D5245 llvm-svn: 218247
2014-09-22 21:11:35 +08:00
; X32ABI-LABEL: test_basic:
; X32ABI: cmpl %fs:64, %esp
; X32ABI-NEXT: ja .LBB0_2
; X32ABI: movl $24, %r10d
; X32ABI-NEXT: movl $0, %r11d
; X32ABI-NEXT: callq __morestack
; X32ABI-NEXT: ret
; X32ABI: movl %esp, %[[EDI:edi|eax]]
; X32ABI: subl %{{.*}}, %[[EDI]]
; X32ABI-NEXT: cmpl %[[EDI]], %fs:64
; X32ABI: movl %[[EDI]], %esp
; X32ABI: movl %{{.*}}, %edi
; X32ABI-NEXT: callq __morestack_allocate_stack_space
; X32ABI: movl %eax, %edi
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
}
Move the segmented stack switch to a function attribute This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! llvm-svn: 205997
2014-04-11 06:58:43 +08:00
attributes #0 = { "split-stack" }