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llvm-mirror/test/CodeGen/X86/stackmap.ll
Philip Reames 9ca9533b96 Explicitly report runtime stack realignment in StackMap section 
This change adds code to explicitly mark a function which requires runtime stack realignment as not having a fixed frame size in the StackMap section. As it happens, this is not actually a functional change. The size that would be reported without the check is also "-1", but as far as I can tell, that's an accident. The code change makes this explicit.

Note: There's a separate bug in handling of stackmaps and patchpoints in functions which need dynamic frame realignment. The current code assumes that offsets can be calculated from RBP, but realigned frames must use RSP. (There's a variable gap between RBP and the spill slots.) This change set does not address that issue.

Reviewers: atrick, ributzka

Differential Revision: http://reviews.llvm.org/D4572

llvm-svn: 214534
2014-08-01 18:26:27 +00:00

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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7 -disable-fp-elim | FileCheck %s
;
; Note: Print verbose stackmaps using -debug-only=stackmaps.
; CHECK-LABEL: .section __LLVM_STACKMAPS,__llvm_stackmaps
; CHECK-NEXT: __LLVM_StackMaps:
; Header
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .short 0
; Num Functions
; CHECK-NEXT: .long 16
; Num LargeConstants
; CHECK-NEXT: .long 3
; Num Callsites
; CHECK-NEXT: .long 20
; Functions and stack size
; CHECK-NEXT: .quad _constantargs
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _osrinline
; CHECK-NEXT: .quad 24
; CHECK-NEXT: .quad _osrcold
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _propertyRead
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _propertyWrite
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _jsVoidCall
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _jsIntCall
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _spilledValue
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _spilledStackMapValue
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _spillSubReg
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _subRegOffset
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _liveConstant
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _directFrameIdx
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _longid
; CHECK-NEXT: .quad 8
; CHECK-NEXT: .quad _clobberScratch
; CHECK-NEXT: .quad 56
; CHECK-NEXT: .quad _needsStackRealignment
; CHECK-NEXT: .quad -1
; Large Constants
; CHECK-NEXT: .quad 2147483648
; CHECK-NEXT: .quad 4294967295
; CHECK-NEXT: .quad 4294967296
; Callsites
; Constant arguments
;
; CHECK-NEXT: .quad 1
; CHECK-NEXT: .long L{{.*}}-_constantargs
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 12
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long -1
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long -1
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 65536
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 2000000000
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 2147483647
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long -1
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long -1
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 0
; LargeConstant at index 0
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 0
; LargeConstant at index 1
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 1
; LargeConstant at index 2
; CHECK-NEXT: .byte 5
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 2
; SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long -1
define void @constantargs() {
entry:
%0 = inttoptr i64 12345 to i8*
tail call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 1, i32 15, i8* %0, i32 0, i16 65535, i16 -1, i32 65536, i32 2000000000, i32 2147483647, i32 -1, i32 4294967295, i32 4294967296, i64 2147483648, i64 4294967295, i64 4294967296, i64 -1)
ret void
}
; Inline OSR Exit
;
; CHECK-LABEL: .long L{{.*}}-_osrinline
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define void @osrinline(i64 %a, i64 %b) {
entry:
; Runtime void->void call.
call void inttoptr (i64 -559038737 to void ()*)()
; Followed by inline OSR patchpoint with 12-byte shadow and 2 live vars.
call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 3, i32 12, i64 %a, i64 %b)
ret void
}
; Cold OSR Exit
;
; 2 live variables in register.
;
; CHECK-LABEL: .long L{{.*}}-_osrcold
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define void @osrcold(i64 %a, i64 %b) {
entry:
%test = icmp slt i64 %a, %b
br i1 %test, label %ret, label %cold
cold:
; OSR patchpoint with 12-byte nop-slide and 2 live vars.
%thunk = inttoptr i64 -559038737 to i8*
call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 4, i32 15, i8* %thunk, i32 0, i64 %a, i64 %b)
unreachable
ret:
ret void
}
; Property Read
; CHECK-LABEL: .long L{{.*}}-_propertyRead
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define i64 @propertyRead(i64* %obj) {
entry:
%resolveRead = inttoptr i64 -559038737 to i8*
%result = call anyregcc i64 (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.i64(i64 5, i32 15, i8* %resolveRead, i32 1, i64* %obj)
%add = add i64 %result, 3
ret i64 %add
}
; Property Write
; CHECK-LABEL: .long L{{.*}}-_propertyWrite
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define void @propertyWrite(i64 %dummy1, i64* %obj, i64 %dummy2, i64 %a) {
entry:
%resolveWrite = inttoptr i64 -559038737 to i8*
call anyregcc void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 6, i32 15, i8* %resolveWrite, i32 2, i64* %obj, i64 %a)
ret void
}
; Void JS Call
;
; 2 live variables in registers.
;
; CHECK-LABEL: .long L{{.*}}-_jsVoidCall
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define void @jsVoidCall(i64 %dummy1, i64* %obj, i64 %arg, i64 %l1, i64 %l2) {
entry:
%resolveCall = inttoptr i64 -559038737 to i8*
call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 7, i32 15, i8* %resolveCall, i32 2, i64* %obj, i64 %arg, i64 %l1, i64 %l2)
ret void
}
; i64 JS Call
;
; 2 live variables in registers.
;
; CHECK-LABEL: .long L{{.*}}-_jsIntCall
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short {{[0-9]+}}
; CHECK-NEXT: .long 0
define i64 @jsIntCall(i64 %dummy1, i64* %obj, i64 %arg, i64 %l1, i64 %l2) {
entry:
%resolveCall = inttoptr i64 -559038737 to i8*
%result = call i64 (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.i64(i64 8, i32 15, i8* %resolveCall, i32 2, i64* %obj, i64 %arg, i64 %l1, i64 %l2)
%add = add i64 %result, 3
ret i64 %add
}
; Spilled stack map values.
;
; Verify 17 stack map entries.
;
; CHECK-LABEL: .long L{{.*}}-_spilledValue
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 17
;
; Check that at least one is a spilled entry from RBP.
; Location: Indirect RBP + ...
; CHECK: .byte 3
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 6
define void @spilledValue(i64 %arg0, i64 %arg1, i64 %arg2, i64 %arg3, i64 %arg4, i64 %l0, i64 %l1, i64 %l2, i64 %l3, i64 %l4, i64 %l5, i64 %l6, i64 %l7, i64 %l8, i64 %l9, i64 %l10, i64 %l11, i64 %l12, i64 %l13, i64 %l14, i64 %l15, i64 %l16) {
entry:
call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 11, i32 15, i8* null, i32 5, i64 %arg0, i64 %arg1, i64 %arg2, i64 %arg3, i64 %arg4, i64 %l0, i64 %l1, i64 %l2, i64 %l3, i64 %l4, i64 %l5, i64 %l6, i64 %l7, i64 %l8, i64 %l9, i64 %l10, i64 %l11, i64 %l12, i64 %l13, i64 %l14, i64 %l15, i64 %l16)
ret void
}
; Spilled stack map values.
;
; Verify 17 stack map entries.
;
; CHECK-LABEL: .long L{{.*}}-_spilledStackMapValue
; CHECK-NEXT: .short 0
; CHECK-NEXT: .short 17
;
; Check that at least one is a spilled entry from RBP.
; Location: Indirect RBP + ...
; CHECK: .byte 3
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 6
define webkit_jscc void @spilledStackMapValue(i64 %l0, i64 %l1, i64 %l2, i64 %l3, i64 %l4, i64 %l5, i64 %l6, i64 %l7, i64 %l8, i64 %l9, i64 %l10, i64 %l11, i64 %l12, i64 %l13, i64 %l14, i64 %l15, i64 %l16) {
entry:
call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 12, i32 15, i64 %l0, i64 %l1, i64 %l2, i64 %l3, i64 %l4, i64 %l5, i64 %l6, i64 %l7, i64 %l8, i64 %l9, i64 %l10, i64 %l11, i64 %l12, i64 %l13, i64 %l14, i64 %l15, i64 %l16)
ret void
}
; Spill a subregister stackmap operand.
;
; CHECK-LABEL: .long L{{.*}}-_spillSubReg
; CHECK-NEXT: .short 0
; 4 locations
; CHECK-NEXT: .short 1
;
; Check that the subregister operand is a 4-byte spill.
; Location: Indirect, 4-byte, RBP + ...
; CHECK: .byte 3
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .short 6
define void @spillSubReg(i64 %arg) #0 {
bb:
br i1 undef, label %bb1, label %bb2
bb1:
unreachable
bb2:
%tmp = load i64* inttoptr (i64 140685446136880 to i64*)
br i1 undef, label %bb16, label %bb17
bb16:
unreachable
bb17:
%tmp32 = trunc i64 %tmp to i32
br i1 undef, label %bb60, label %bb61
bb60:
tail call void asm sideeffect "nop", "~{ax},~{bx},~{cx},~{dx},~{bp},~{si},~{di},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 13, i32 5, i32 %tmp32)
unreachable
bb61:
unreachable
}
; Map a single byte subregister. There is no DWARF register number, so
; we expect the register to be encoded with the proper size and spill offset. We don't know which
;
; CHECK-LABEL: .long L{{.*}}-_subRegOffset
; CHECK-NEXT: .short 0
; 2 locations
; CHECK-NEXT: .short 2
;
; Check that the subregister operands are 1-byte spills.
; Location 0: Register, 4-byte, AL
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 0
;
; Location 1: Register, 4-byte, BL
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .short 3
; CHECK-NEXT: .long 0
define void @subRegOffset(i16 %arg) {
%v = mul i16 %arg, 5
%a0 = trunc i16 %v to i8
tail call void asm sideeffect "nop", "~{bx}"() nounwind
%arghi = lshr i16 %v, 8
%a1 = trunc i16 %arghi to i8
tail call void asm sideeffect "nop", "~{cx},~{dx},~{bp},~{si},~{di},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 14, i32 5, i8 %a0, i8 %a1)
ret void
}
; Map a constant value.
;
; CHECK-LABEL: .long L{{.*}}-_liveConstant
; CHECK-NEXT: .short 0
; 1 location
; CHECK-NEXT: .short 1
; Loc 0: SmallConstant
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 33
define void @liveConstant() {
tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 15, i32 5, i32 33)
ret void
}
; Directly map an alloca's address.
;
; Callsite 16
; CHECK-LABEL: .long L{{.*}}-_directFrameIdx
; CHECK-NEXT: .short 0
; 1 location
; CHECK-NEXT: .short 1
; Loc 0: Direct RBP - ofs
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 6
; CHECK-NEXT: .long
; Callsite 17
; CHECK-LABEL: .long L{{.*}}-_directFrameIdx
; CHECK-NEXT: .short 0
; 2 locations
; CHECK-NEXT: .short 2
; Loc 0: Direct RBP - ofs
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 6
; CHECK-NEXT: .long
; Loc 1: Direct RBP - ofs
; CHECK-NEXT: .byte 2
; CHECK-NEXT: .byte 8
; CHECK-NEXT: .short 6
; CHECK-NEXT: .long
define void @directFrameIdx() {
entry:
%metadata1 = alloca i64, i32 3, align 8
store i64 11, i64* %metadata1
store i64 12, i64* %metadata1
store i64 13, i64* %metadata1
call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 16, i32 0, i64* %metadata1)
%metadata2 = alloca i8, i32 4, align 8
%metadata3 = alloca i16, i32 4, align 8
call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 17, i32 5, i8* null, i32 0, i8* %metadata2, i16* %metadata3)
ret void
}
; Test a 64-bit ID.
;
; CHECK: .quad 4294967295
; CHECK-LABEL: .long L{{.*}}-_longid
; CHECK: .quad 4294967296
; CHECK-LABEL: .long L{{.*}}-_longid
; CHECK: .quad 9223372036854775807
; CHECK-LABEL: .long L{{.*}}-_longid
; CHECK: .quad -1
; CHECK-LABEL: .long L{{.*}}-_longid
define void @longid() {
entry:
tail call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 4294967295, i32 0, i8* null, i32 0)
tail call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 4294967296, i32 0, i8* null, i32 0)
tail call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 9223372036854775807, i32 0, i8* null, i32 0)
tail call void (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.void(i64 -1, i32 0, i8* null, i32 0)
ret void
}
; Map a value when R11 is the only free register.
; The scratch register should not be used for a live stackmap value.
;
; CHECK-LABEL: .long L{{.*}}-_clobberScratch
; CHECK-NEXT: .short 0
; 1 location
; CHECK-NEXT: .short 1
; Loc 0: Indirect fp - offset
; CHECK-NEXT: .byte 3
; CHECK-NEXT: .byte 4
; CHECK-NEXT: .short 6
; CHECK-NEXT: .long -{{[0-9]+}}
define void @clobberScratch(i32 %a) {
tail call void asm sideeffect "nop", "~{ax},~{bx},~{cx},~{dx},~{bp},~{si},~{di},~{r8},~{r9},~{r10},~{r12},~{r13},~{r14},~{r15}"() nounwind
tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 16, i32 8, i32 %a)
ret void
}
; A stack frame which needs to be realigned at runtime (to meet alignment
; criteria for values on the stack) does not have a fixed frame size.
; CHECK-LABEL: .long L{{.*}}-_needsStackRealignment
; CHECK-NEXT: .short 0
; 0 locations
; CHECK-NEXT: .short 0
define void @needsStackRealignment() {
%val = alloca i64, i32 3, align 128
tail call void (...)* @escape_values(i64* %val)
; Note: Adding any non-constant to the stackmap would fail because we
; expected to be able to address off the frame pointer. In a realigned
; frame, we must use the stack pointer instead. This is a separate bug.
tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 0, i32 0)
ret void
}
declare void @escape_values(...)
declare void @llvm.experimental.stackmap(i64, i32, ...)
declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...)
declare i64 @llvm.experimental.patchpoint.i64(i64, i32, i8*, i32, ...)
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