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llvm-mirror/test/CodeGen/X86/deopt-bundles.ll
Sanjoy Das 4e8fc79b92 Don't force SP-relative addressing for statepoints 
Summary:
...  when the offset is not statically known.

Prioritize addresses relative to the stack pointer in the stackmap, but
fallback gracefully to other modes of addressing if the offset to the
stack pointer is not a known constant.

Patch by Oscar Blumberg!

Reviewers: sanjoy

Subscribers: llvm-commits, majnemer, rnk, sanjoy, thanm

Differential Revision: http://reviews.llvm.org/D21259

llvm-svn: 272756
2016-06-15 05:35:14 +00:00

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; RUN: llc < %s | FileCheck %s
; RUN: llc -O3 < %s | FileCheck %s
; RUN: llc -O3 -debug-only=stackmaps < %s 2>&1 | FileCheck -check-prefix=STACKMAPS %s
; REQUIRES: asserts
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
; STACKMAPS: Stack Maps: callsite 2882400015
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
; STACKMAPS-NEXT: Stack Maps: callsite 4242
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
; STACKMAPS-NEXT: Stack Maps: callsite 4243
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 16 [encoding: .byte 4, .byte 8, .short 0, .int 16]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
; STACKMAPS-NEXT: Stack Maps: callsite 2882400015
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 2 [encoding: .byte 4, .byte 8, .short 0, .int 2]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
; STACKMAPS-NEXT: Stack Maps: callsite 2882400015
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 3 [encoding: .byte 4, .byte 8, .short 0, .int 3]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
; STACKMAPS-NEXT: Stack Maps: callsite 4243
; STACKMAPS-NEXT: Stack Maps: has 4 locations
; STACKMAPS-NEXT: Stack Maps: Loc 0: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 1: Constant 0 [encoding: .byte 4, .byte 8, .short 0, .int 0]
; STACKMAPS-NEXT: Stack Maps: Loc 2: Constant 1 [encoding: .byte 4, .byte 8, .short 0, .int 1]
; STACKMAPS-NEXT: Stack Maps: Loc 3: Constant 55 [encoding: .byte 4, .byte 8, .short 0, .int 55]
; STACKMAPS-NEXT: Stack Maps: has 0 live-out registers
declare i32 @callee_0()
declare i32 @callee_1(i32)
declare i32 @callee_vararg(...)
define i32 @caller_0() {
; CHECK-LABEL: _caller_0
entry:
%v = call i32 @callee_0() [ "deopt"(i32 0) ]
%v2 = add i32 %v, 1
ret i32 %v2
; CHECK: callq _callee_0
; CHECK: incl %eax
; CHECK: retq
}
define i32 @caller_1() {
; CHECK-LABEL: _caller_1
entry:
%v = call i32 @callee_1(i32 42) "statepoint-id"="4242" [ "deopt"(i32 1) ]
ret i32 %v
; CHECK: callq _callee_1
; CHECK: popq %rcx
; CHECK: retq
}
define i32 @caller_vararg() {
; CHECK-LABEL: _caller_vararg
entry:
; CHECK: movb $1, %al
; CHECK: callq _callee_vararg
%v = call i32(...) @callee_vararg(i32 42, double 500.0) "statepoint-id"="4243" [ "deopt"(i32 16) ]
ret i32 %v
}
define i32 @invoker_0() personality i8 0 {
; CHECK-LABEL: _invoker_0
entry:
%v = invoke i32 @callee_0() [ "deopt"(i32 2) ]
to label %normal unwind label %uw
normal:
ret i32 %v
uw:
%ehvals = landingpad { i8*, i32 }
cleanup
ret i32 1
; CHECK: callq _callee_0
; CHECK: popq %rcx
; CHECK: retq
; CHECK: movl $1, %eax
; CHECK: popq %rcx
; CHECK: retq
}
define i32 @invoker_1() personality i8 0 {
; CHECK-LABEL: _invoker_1
entry:
%v = invoke i32 @callee_1(i32 45) "statepoint-num-patch-bytes"="9" [ "deopt"(i32 3) ]
to label %normal unwind label %uw
normal:
ret i32 %v
uw:
%ehvals = landingpad { i8*, i32 }
cleanup
ret i32 1
; CHECK: movl $45, %edi
; CHECK: nopw 512(%rax,%rax)
; CHECK: popq %rcx
; CHECK: retq
; CHECK: movl $1, %eax
; CHECK: popq %rcx
; CHECK: retq
}
define i32 @invoker_2() personality i32 (...)* @__CxxFrameHandler3 {
entry:
%val = invoke i32 @callee_1(i32 1)
to label %try.cont unwind label %catch.dispatch
catch.dispatch:
%cs1 = catchswitch within none [label %catch] unwind to caller
catch:
%cp1 = catchpad within %cs1 [i8* null, i32 64, i8* null]
%val2 = call i32 @callee_1(i32 100) "statepoint-id"="4243" [ "funclet"(token %cp1), "deopt"(i32 55) ]
catchret from %cp1 to label %try.cont
try.cont:
ret i32 0
}
declare i32 @__CxxFrameHandler3(...)
define void @f_0(i64 %n) {
; CHECK-LABEL: _f_0
%s = alloca i64
%vl = alloca i64, i64 %n
; Check that the stackmap does not reference %s through
; SP since the offset is not static because of %vl.
; STACKMAPS: Loc 3: Direct 6
call void @g_0(i64* %vl) [ "deopt"(i64* %s) ]
ret void
}
declare void @g_0(i64* %vl)
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