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728acc9bd9
This is mostly to test the waters. I'd like to get results from FNT build bots and other bots running on non-x86 platforms. This feature has been pretty heavily tested over the last few months by me, and it fixes several of the execution time regressions caused by the inlining work by preventing inlining decisions from radically impacting block layout. I've seen very large improvements in yacr2 and ackermann benchmarks, along with the expected noise across all of the benchmark suite whenever code layout changes. I've analyzed all of the regressions and fixed them, or found them to be impossible to fix. See my email to llvmdev for more details. I'd like for this to be in 3.1 as it complements the inliner changes, but if any failures are showing up or anyone has concerns, it is just a flag flip and so can be easily turned off. I'm switching it on tonight to try and get at least one run through various folks' performance suites in case SPEC or something else has serious issues with it. I'll watch bots and revert if anything shows up. llvm-svn: 154816
332 lines
6.7 KiB
LLVM
332 lines
6.7 KiB
LLVM
; RUN: llc < %s -mtriple=i686-linux -mattr=+sse2 -asm-verbose=false | FileCheck %s -check-prefix=32
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; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse2 -asm-verbose=false | FileCheck %s -check-prefix=64
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define void @t1(i32 %x) nounwind ssp {
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entry:
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; 32: t1:
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; 32: jmp {{_?}}foo
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; 64: t1:
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; 64: jmp {{_?}}foo
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tail call void @foo() nounwind
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ret void
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}
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declare void @foo()
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define void @t2() nounwind ssp {
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entry:
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; 32: t2:
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; 32: jmp {{_?}}foo2
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; 64: t2:
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; 64: jmp {{_?}}foo2
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%0 = tail call i32 @foo2() nounwind
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ret void
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}
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declare i32 @foo2()
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define void @t3() nounwind ssp {
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entry:
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; 32: t3:
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; 32: jmp {{_?}}foo3
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; 64: t3:
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; 64: jmp {{_?}}foo3
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%0 = tail call i32 @foo3() nounwind
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ret void
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}
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declare i32 @foo3()
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define void @t4(void (i32)* nocapture %x) nounwind ssp {
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entry:
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; 32: t4:
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; 32: calll *
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; FIXME: gcc can generate a tailcall for this. But it's tricky.
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; 64: t4:
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; 64-NOT: call
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; 64: jmpq *
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tail call void %x(i32 0) nounwind
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ret void
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}
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define void @t5(void ()* nocapture %x) nounwind ssp {
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entry:
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; 32: t5:
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; 32-NOT: call
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; 32: jmpl *4(%esp)
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; 64: t5:
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; 64-NOT: call
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; 64: jmpq *%rdi
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tail call void %x() nounwind
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ret void
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}
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define i32 @t6(i32 %x) nounwind ssp {
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entry:
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; 32: t6:
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; 32: calll {{_?}}t6
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; 32: jmp {{_?}}bar
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; 64: t6:
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; 64: jmp {{_?}}t6
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; 64: jmp {{_?}}bar
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%0 = icmp slt i32 %x, 10
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br i1 %0, label %bb, label %bb1
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bb:
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%1 = add nsw i32 %x, -1
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%2 = tail call i32 @t6(i32 %1) nounwind ssp
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ret i32 %2
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bb1:
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%3 = tail call i32 @bar(i32 %x) nounwind
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ret i32 %3
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}
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declare i32 @bar(i32)
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define i32 @t7(i32 %a, i32 %b, i32 %c) nounwind ssp {
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entry:
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; 32: t7:
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; 32: jmp {{_?}}bar2
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; 64: t7:
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; 64: jmp {{_?}}bar2
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%0 = tail call i32 @bar2(i32 %a, i32 %b, i32 %c) nounwind
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ret i32 %0
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}
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declare i32 @bar2(i32, i32, i32)
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define signext i16 @t8() nounwind ssp {
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entry:
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; 32: t8:
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; 32: calll {{_?}}bar3
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; 64: t8:
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; 64: callq {{_?}}bar3
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%0 = tail call signext i16 @bar3() nounwind ; <i16> [#uses=1]
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ret i16 %0
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}
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declare signext i16 @bar3()
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define signext i16 @t9(i32 (i32)* nocapture %x) nounwind ssp {
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entry:
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; 32: t9:
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; 32: calll *
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; 64: t9:
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; 64: callq *
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%0 = bitcast i32 (i32)* %x to i16 (i32)*
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%1 = tail call signext i16 %0(i32 0) nounwind
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ret i16 %1
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}
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define void @t10() nounwind ssp {
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entry:
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; 32: t10:
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; 32: calll
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; 64: t10:
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; 64: callq
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%0 = tail call i32 @foo4() noreturn nounwind
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unreachable
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}
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declare i32 @foo4()
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define i32 @t11(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind ssp {
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; In 32-bit mode, it's emitting a bunch of dead loads that are not being
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; eliminated currently.
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; 32: t11:
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; 32-NOT: subl ${{[0-9]+}}, %esp
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; 32: je
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; 32-NOT: movl
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; 32-NOT: addl ${{[0-9]+}}, %esp
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; 32: jmp {{_?}}foo5
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; 64: t11:
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; 64-NOT: subq ${{[0-9]+}}, %esp
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; 64-NOT: addq ${{[0-9]+}}, %esp
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; 64: jmp {{_?}}foo5
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entry:
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%0 = icmp eq i32 %x, 0
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br i1 %0, label %bb6, label %bb
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bb:
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%1 = tail call i32 @foo5(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind
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ret i32 %1
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bb6:
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ret i32 0
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}
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declare i32 @foo5(i32, i32, i32, i32, i32)
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%struct.t = type { i32, i32, i32, i32, i32 }
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define i32 @t12(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind ssp {
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; 32: t12:
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; 32-NOT: subl ${{[0-9]+}}, %esp
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; 32-NOT: addl ${{[0-9]+}}, %esp
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; 32: jmp {{_?}}foo6
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; 64: t12:
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; 64-NOT: subq ${{[0-9]+}}, %esp
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; 64-NOT: addq ${{[0-9]+}}, %esp
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; 64: jmp {{_?}}foo6
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entry:
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%0 = icmp eq i32 %x, 0
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br i1 %0, label %bb2, label %bb
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bb:
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%1 = tail call i32 @foo6(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind
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ret i32 %1
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bb2:
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ret i32 0
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}
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declare i32 @foo6(i32, i32, %struct.t* byval align 4)
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; rdar://r7717598
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%struct.ns = type { i32, i32 }
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%struct.cp = type { float, float, float, float, float }
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define %struct.ns* @t13(%struct.cp* %yy) nounwind ssp {
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; 32: t13:
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; 32-NOT: jmp
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; 32: calll
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; 32: ret
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; 64: t13:
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; 64-NOT: jmp
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; 64: callq
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; 64: ret
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entry:
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%0 = tail call fastcc %struct.ns* @foo7(%struct.cp* byval align 4 %yy, i8 signext 0) nounwind
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ret %struct.ns* %0
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}
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; rdar://6195379
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; llvm can't do sibcall for this in 32-bit mode (yet).
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declare fastcc %struct.ns* @foo7(%struct.cp* byval align 4, i8 signext) nounwind ssp
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%struct.__block_descriptor = type { i64, i64 }
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%struct.__block_descriptor_withcopydispose = type { i64, i64, i8*, i8* }
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%struct.__block_literal_1 = type { i8*, i32, i32, i8*, %struct.__block_descriptor* }
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%struct.__block_literal_2 = type { i8*, i32, i32, i8*, %struct.__block_descriptor_withcopydispose*, void ()* }
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define void @t14(%struct.__block_literal_2* nocapture %.block_descriptor) nounwind ssp {
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entry:
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; 64: t14:
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; 64: movq 32(%rdi)
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; 64-NOT: movq 16(%rdi)
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; 64: jmpq *16({{%rdi|%rax}})
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%0 = getelementptr inbounds %struct.__block_literal_2* %.block_descriptor, i64 0, i32 5 ; <void ()**> [#uses=1]
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%1 = load void ()** %0, align 8 ; <void ()*> [#uses=2]
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%2 = bitcast void ()* %1 to %struct.__block_literal_1* ; <%struct.__block_literal_1*> [#uses=1]
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%3 = getelementptr inbounds %struct.__block_literal_1* %2, i64 0, i32 3 ; <i8**> [#uses=1]
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%4 = load i8** %3, align 8 ; <i8*> [#uses=1]
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%5 = bitcast i8* %4 to void (i8*)* ; <void (i8*)*> [#uses=1]
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%6 = bitcast void ()* %1 to i8* ; <i8*> [#uses=1]
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tail call void %5(i8* %6) nounwind
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ret void
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}
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; rdar://7726868
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%struct.foo = type { [4 x i32] }
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define void @t15(%struct.foo* noalias sret %agg.result) nounwind {
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; 32: t15:
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; 32: calll {{_?}}f
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; 32: ret $4
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; 64: t15:
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; 64: callq {{_?}}f
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; 64: ret
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tail call fastcc void @f(%struct.foo* noalias sret %agg.result) nounwind
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ret void
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}
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declare void @f(%struct.foo* noalias sret) nounwind
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define void @t16() nounwind ssp {
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entry:
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; 32: t16:
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; 32: calll {{_?}}bar4
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; 32: fstp
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; 64: t16:
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; 64: jmp {{_?}}bar4
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%0 = tail call double @bar4() nounwind
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ret void
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}
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declare double @bar4()
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; rdar://6283267
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define void @t17() nounwind ssp {
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entry:
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; 32: t17:
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; 32: jmp {{_?}}bar5
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; 64: t17:
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; 64: xorb %al, %al
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; 64: jmp {{_?}}bar5
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tail call void (...)* @bar5() nounwind
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ret void
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}
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declare void @bar5(...)
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; rdar://7774847
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define void @t18() nounwind ssp {
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entry:
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; 32: t18:
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; 32: calll {{_?}}bar6
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; 32: fstp %st(0)
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; 64: t18:
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; 64: xorb %al, %al
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; 64: jmp {{_?}}bar6
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%0 = tail call double (...)* @bar6() nounwind
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ret void
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}
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declare double @bar6(...)
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define void @t19() alignstack(32) nounwind {
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entry:
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; CHECK: t19:
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; CHECK: andl $-32
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; CHECK: calll {{_?}}foo
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tail call void @foo() nounwind
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ret void
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}
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; If caller / callee calling convention mismatch then check if the return
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; values are returned in the same registers.
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; rdar://7874780
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define double @t20(double %x) nounwind {
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entry:
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; 32: t20:
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; 32: calll {{_?}}foo20
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; 32: fldl (%esp)
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; 64: t20:
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; 64: jmp {{_?}}foo20
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%0 = tail call fastcc double @foo20(double %x) nounwind
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ret double %0
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}
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declare fastcc double @foo20(double) nounwind
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