History log of /dalvik/vm/compiler/Loop.h
Revision Date Author Comments
375fb116bcb817b37509ab579dbd55cdbb765cbf 15-Jun-2011 Carl Shapiro <cshapiro@google.com> Normalize the include guard style.

An leading underscore followed by a capital letter is a reserved
name space in C and C++.

This change also moves any #include directives within the include
guard in some of the compiler/codegen/arm header files.

Change-Id: I9715e2c5301699d31886e61d0fe6e29483555a2a
32115a971ea00ab2421fab4e4a3afa6c50c82173 22-Mar-2011 Ben Cheng <bccheng@android.com> Generate code for loops formed with the new builder

Adapt the existing counted loop analysis and range/null check
elimination code to work with the new loop building heuristics.
Cleaned up the old ad-hoc loop builder.

Suspend polling is enabled by default for loops. The backward chaining
cell will be used in self-verification and profiling mode.

If the loop includes accesses to resolved fields/classes, abort code
generation for now and revert to the basic acyclic trace. Added
tests/090-loop-formation to make sure the JIT won't choke on such
instructions.

Change-Id: Idbc57df0a745be3b692f68c1acb6d4861c537f75
46cd4fb73824ab57160994c149ce2d7a06923b83 17-Mar-2011 Ben Cheng <bccheng@android.com> Extend a trace with a backward branch into a loop.

When seeing a trace that ends with a backward branch, exhaust all code
blocks reachable from that trace and try to identify if there exists a
non-nested loop. If the derived loop is found to be too complex or only
acyclic code is seen, revert to the original compilation mechanism to
translate a simple trace.

This CL uses the whole-method parser/dataflow analysis framework to
identify such loops. No optimization/codegen are performed yet.

Bug: 4086718

Change-Id: I19ed3ee53ea1cbda33940c533de8e9220e647156
9a1f81699cc05b58378ffb9aadb4e97677943791 02-Dec-2010 Dan Bornstein <danfuzz@android.com> It's "opcode" not "opCode".

Similarly "Opcode" not "OpCode".

This appears to be the general worldwide consensus on the matter. Other
residents of my office didn't seem to mind one way or the other how it's
spelled in our code, but for whatever reason, it really bugged me.

Change-Id: Ia0b73d19c54aefc0f543a9c9451dda22ee876a59
4238ec2ad1ace5103b2206a483f5f03d2e96c476 25-Aug-2009 Ben Cheng <bccheng@android.com> Implement SSA-based loop optimizations.

For traces of simple natural loops (ie no invokes/side exits) null and range
checks will be hoisted in to entry block.

For acyclic traces SSA representation will be formed but no optimizations are
applied (for now).

SSA representation will be printed with the normal verbose output. For example:

D/dalvikvm( 1248): Dumping LIR insns
D/dalvikvm( 1248): installed code is at 0x428559d4
D/dalvikvm( 1248): total size is 324 bytes
D/dalvikvm( 1248): 0x428559d4 (0000): data 0x012c(300)
D/dalvikvm( 1248): -------- entry offset: 0x002b
D/dalvikvm( 1248): -------- MIR_OP_NULL_N_RANGE_UP_CHECK
D/dalvikvm( 1248): 0x428559d6 (0002): ldr r0, [r5, #36]
D/dalvikvm( 1248): 0x428559d8 (0004): ldr r1, [r5, #12]
D/dalvikvm( 1248): 0x428559da (0006): cbz r0,0x42855a06
D/dalvikvm( 1248): 0x428559dc (0008): ldr r0, [r0, #8]
D/dalvikvm( 1248): 0x428559de (000a): subs r1, #1
D/dalvikvm( 1248): 0x428559e0 (000c): cmp r1, r0
D/dalvikvm( 1248): 0x428559e2 (000e): bge 0x42855a06
D/dalvikvm( 1248): -------- MIR_OP_NULL_N_RANGE_UP_CHECK
D/dalvikvm( 1248): 0x428559e4 (0010): ldr r0, [r5, #40]
D/dalvikvm( 1248): 0x428559e6 (0012): ldr r1, [r5, #12]
D/dalvikvm( 1248): 0x428559e8 (0014): cbz r0,0x42855a06
D/dalvikvm( 1248): 0x428559ea (0016): ldr r0, [r0, #8]
D/dalvikvm( 1248): 0x428559ec (0018): subs r1, #1
D/dalvikvm( 1248): 0x428559ee (001a): cmp r1, r0
D/dalvikvm( 1248): 0x428559f0 (001c): bge 0x42855a06
D/dalvikvm( 1248): -------- MIR_OP_NULL_N_RANGE_UP_CHECK
D/dalvikvm( 1248): 0x428559f2 (001e): ldr r0, [r5, #32]
D/dalvikvm( 1248): 0x428559f4 (0020): ldr r1, [r5, #12]
D/dalvikvm( 1248): 0x428559f6 (0022): cbz r0,0x42855a06
D/dalvikvm( 1248): 0x428559f8 (0024): ldr r0, [r0, #8]
D/dalvikvm( 1248): 0x428559fa (0026): cmp r1, r0
D/dalvikvm( 1248): 0x428559fc (0028): bge 0x42855a06
D/dalvikvm( 1248): -------- MIR_OP_LOWER_BOUND_CHECK
D/dalvikvm( 1248): 0x428559fe (002a): ldr r0, [r5, #44]
D/dalvikvm( 1248): 0x42855a00 (002c): cmp r0, #1
D/dalvikvm( 1248): 0x42855a02 (002e): blt 0x42855a06
D/dalvikvm( 1248): 0x42855a04 (0030): b 0x42855a08
D/dalvikvm( 1248): 0x42855a06 (0032): b 0x42855af0
D/dalvikvm( 1248): L0x002b:
D/dalvikvm( 1248): -------- MIR_OP_PHI
D/dalvikvm( 1248): -------- s20(v11_1) <- s11(v11_0) s46(v11_2)
D/dalvikvm( 1248): -------- dalvik offset: 0x002b @ aget-wide
D/dalvikvm( 1248): -------- s21(v12_1) s22(v13_1) <- s9(v9_0) s20(v11_1)
D/dalvikvm( 1248): 0x42855a08 (0034): ldr r2, [r5, #36]
D/dalvikvm( 1248): 0x42855a0a (0036): ldr r3, [r5, #44]
D/dalvikvm( 1248): 0x42855a0c (0038): adds r2, r2, #16
D/dalvikvm( 1248): 0x42855a0e (003a): lsls r3, r3, #3
D/dalvikvm( 1248): 0x42855a10 (003c): ldr r0, [r2, r3]
D/dalvikvm( 1248): 0x42855a12 (003e): adds r2, r2, #4
D/dalvikvm( 1248): 0x42855a14 (0040): ldr r1, [r2, r3]
D/dalvikvm( 1248): -------- dalvik offset: 0x002d @ aget-wide
D/dalvikvm( 1248): -------- s23(v14_1) s24(v15_1) <- s10(v10_0) s20(v11_1)
D/dalvikvm( 1248): 0x42855a16 (0042): ldr r3, [r5, #40]
D/dalvikvm( 1248): 0x42855a18 (0044): str r0, [r5, #48]
D/dalvikvm( 1248): 0x42855a1a (0046): ldr r0, [r5, #44]
D/dalvikvm( 1248): 0x42855a1c (0048): adds r3, r3, #16
D/dalvikvm( 1248): 0x42855a1e (004a): lsls r0, r0, #3
D/dalvikvm( 1248): 0x42855a20 (004c): str r1, [r5, #52]
D/dalvikvm( 1248): 0x42855a22 (004e): ldr r1, [r3, r0]
D/dalvikvm( 1248): 0x42855a24 (0050): adds r3, r3, #4
D/dalvikvm( 1248): 0x42855a26 (0052): ldr r2, [r3, r0]
D/dalvikvm( 1248): -------- dalvik offset: 0x002f @ add-double/2addr
D/dalvikvm( 1248): -------- s25(v12_2) s26(v13_2) <- s21(v12_1) s22(v13_1) s23(v14_1) s24(v15_1)
D/dalvikvm( 1248): 0x42855a28 (0054): str r1, [r5, #56]
D/dalvikvm( 1248): 0x42855a2a (0056): str r2, [r5, #60]
D/dalvikvm( 1248): 0x42855a2c (0058): vldr d1, [r5, #48]
D/dalvikvm( 1248): 0x42855a30 (005c): vldr d2, [r5, #56]
D/dalvikvm( 1248): 0x42855a34 (0060): vadd d0, d1, d2
D/dalvikvm( 1248): -------- dalvik offset: 0x0030 @ const/4
D/dalvikvm( 1248): -------- s27(v14_2) <-
D/dalvikvm( 1248): 0x42855a38 (0064): movs r2, #1
D/dalvikvm( 1248): -------- dalvik offset: 0x0031 @ sub-int
D/dalvikvm( 1248): -------- s28(v14_3) <- s20(v11_1) s27(v14_2)
D/dalvikvm( 1248): 0x42855a3a (0066): ldr r3, [r5, #44]
D/dalvikvm( 1248): 0x42855a3c (0068): subs r0, r3, r2
D/dalvikvm( 1248): -------- dalvik offset: 0x0033 @ aget-wide
D/dalvikvm( 1248): -------- s29(v14_4) s30(v15_2) <- s8(v8_0) s28(v14_3)
D/dalvikvm( 1248): 0x42855a3e (006a): ldr r3, [r5, #32]
D/dalvikvm( 1248): 0x42855a40 (006c): adds r3, r3, #16
D/dalvikvm( 1248): 0x42855a42 (006e): str r0, [r5, #56]
D/dalvikvm( 1248): 0x42855a44 (0070): lsls r0, r0, #3
D/dalvikvm( 1248): 0x42855a46 (0072): vstr d0, [r5, #48]
D/dalvikvm( 1248): 0x42855a4a (0076): ldr r1, [r3, r0]
D/dalvikvm( 1248): 0x42855a4c (0078): adds r3, r3, #4
D/dalvikvm( 1248): 0x42855a4e (007a): ldr r2, [r3, r0]
D/dalvikvm( 1248): -------- dalvik offset: 0x0035 @ add-double/2addr
D/dalvikvm( 1248): -------- s31(v12_3) s32(v13_3) <- s25(v12_2) s26(v13_2) s29(v14_4) s30(v15_2)
D/dalvikvm( 1248): 0x42855a50 (007c): str r1, [r5, #56]
D/dalvikvm( 1248): 0x42855a52 (007e): str r2, [r5, #60]
D/dalvikvm( 1248): 0x42855a54 (0080): vldr d1, [r5, #48]
D/dalvikvm( 1248): 0x42855a58 (0084): vldr d2, [r5, #56]
D/dalvikvm( 1248): 0x42855a5c (0088): vadd d0, d1, d2
D/dalvikvm( 1248): -------- dalvik offset: 0x0036 @ add-int/lit8
D/dalvikvm( 1248): -------- s33(v14_5) <- s20(v11_1)
D/dalvikvm( 1248): 0x42855a60 (008c): ldr r2, [r5, #44]
D/dalvikvm( 1248): 0x42855a62 (008e): adds r2, r2, #1
D/dalvikvm( 1248): -------- dalvik offset: 0x0038 @ aget-wide
D/dalvikvm( 1248): -------- s34(v14_6) s35(v15_3) <- s8(v8_0) s33(v14_5)
D/dalvikvm( 1248): 0x42855a64 (0090): ldr r1, [r5, #32]
D/dalvikvm( 1248): 0x42855a66 (0092): adds r1, r1, #16
D/dalvikvm( 1248): 0x42855a68 (0094): str r2, [r5, #56]
D/dalvikvm( 1248): 0x42855a6a (0096): lsls r2, r2, #3
D/dalvikvm( 1248): 0x42855a6c (0098): vstr d0, [r5, #48]
D/dalvikvm( 1248): 0x42855a70 (009c): ldr r3, [r1, r2]
D/dalvikvm( 1248): 0x42855a72 (009e): adds r1, r1, #4
D/dalvikvm( 1248): 0x42855a74 (00a0): ldr r0, [r1, r2]
D/dalvikvm( 1248): -------- dalvik offset: 0x003a @ add-double/2addr
D/dalvikvm( 1248): -------- s36(v12_4) s37(v13_4) <- s31(v12_3) s32(v13_3) s34(v14_6) s35(v15_3)
D/dalvikvm( 1248): 0x42855a76 (00a2): str r3, [r5, #56]
D/dalvikvm( 1248): 0x42855a78 (00a4): str r0, [r5, #60]
D/dalvikvm( 1248): 0x42855a7a (00a6): vldr d1, [r5, #48]
D/dalvikvm( 1248): 0x42855a7e (00aa): vldr d2, [r5, #56]
D/dalvikvm( 1248): 0x42855a82 (00ae): vadd d0, d1, d2
D/dalvikvm( 1248): 0x42855a86 (00b2): vstr d0, [r5, #48]
D/dalvikvm( 1248): -------- dalvik offset: 0x003b @ mul-double/2addr
D/dalvikvm( 1248): -------- s38(v12_5) s39(v13_5) <- s36(v12_4) s37(v13_4) s4(v4_0) s5(v5_0)
D/dalvikvm( 1248): 0x42855a8a (00b6): vmov.f64 s2, s0
D/dalvikvm( 1248): 0x42855a8e (00ba): vldr d2, [r5, #16]
D/dalvikvm( 1248): 0x42855a92 (00be): vmuld d0, d1, d2
D/dalvikvm( 1248): -------- dalvik offset: 0x003c @ aget-wide
D/dalvikvm( 1248): -------- s40(v14_7) s41(v15_4) <- s8(v8_0) s20(v11_1)
D/dalvikvm( 1248): 0x42855a96 (00c2): ldr r2, [r5, #32]
D/dalvikvm( 1248): 0x42855a98 (00c4): ldr r3, [r5, #44]
D/dalvikvm( 1248): 0x42855a9a (00c6): adds r2, r2, #16
D/dalvikvm( 1248): 0x42855a9c (00c8): lsls r3, r3, #3
D/dalvikvm( 1248): 0x42855a9e (00ca): vstr d0, [r5, #48]
D/dalvikvm( 1248): 0x42855aa2 (00ce): ldr r0, [r2, r3]
D/dalvikvm( 1248): 0x42855aa4 (00d0): adds r2, r2, #4
D/dalvikvm( 1248): 0x42855aa6 (00d2): ldr r1, [r2, r3]
D/dalvikvm( 1248): 0x42855aa8 (00d4): str r0, [r5, #56]
D/dalvikvm( 1248): 0x42855aaa (00d6): str r1, [r5, #60]
D/dalvikvm( 1248): -------- dalvik offset: 0x003e @ mul-double
D/dalvikvm( 1248): -------- s42(v14_8) s43(v15_5) <- s40(v14_7) s41(v15_4) s16(v16_0) s17(v17_0)
D/dalvikvm( 1248): 0x42855aac (00d8): vldr d1, [r5, #56]
D/dalvikvm( 1248): 0x42855ab0 (00dc): vldr d2, [r5, #64]
D/dalvikvm( 1248): 0x42855ab4 (00e0): vmuld d0, d1, d2
D/dalvikvm( 1248): 0x42855ab8 (00e4): vstr d0, [r5, #56]
D/dalvikvm( 1248): -------- dalvik offset: 0x0040 @ add-double/2addr
D/dalvikvm( 1248): -------- s44(v12_6) s45(v13_6) <- s38(v12_5) s39(v13_5) s42(v14_8) s43(v15_5)
D/dalvikvm( 1248): 0x42855abc (00e8): vldr d1, [r5, #48]
D/dalvikvm( 1248): 0x42855ac0 (00ec): vldr d2, [r5, #56]
D/dalvikvm( 1248): 0x42855ac4 (00f0): vadd d0, d1, d2
D/dalvikvm( 1248): 0x42855ac8 (00f4): vstr d0, [r5, #48]
D/dalvikvm( 1248): -------- dalvik offset: 0x0041 @ aput-wide
D/dalvikvm( 1248): -------- s44(v12_6) s45(v13_6) s8(v8_0) s20(v11_1)
D/dalvikvm( 1248): 0x42855acc (00f8): ldr r3, [r5, #32]
D/dalvikvm( 1248): 0x42855ace (00fa): ldr r0, [r5, #44]
D/dalvikvm( 1248): 0x42855ad0 (00fc): adds r3, r3, #16
D/dalvikvm( 1248): 0x42855ad2 (00fe): ldr r1, [r5, #48]
D/dalvikvm( 1248): 0x42855ad4 (0100): ldr r2, [r5, #52]
D/dalvikvm( 1248): 0x42855ad6 (0102): lsls r0, r0, #3
D/dalvikvm( 1248): 0x42855ad8 (0104): str r1, [r3, r0]
D/dalvikvm( 1248): 0x42855ada (0106): adds r3, r3, #4
D/dalvikvm( 1248): 0x42855adc (0108): str r2, [r3, r0]
D/dalvikvm( 1248): -------- dalvik offset: 0x0043 @ add-int/lit8
D/dalvikvm( 1248): -------- s46(v11_2) <- s20(v11_1)
D/dalvikvm( 1248): 0x42855ade (010a): ldr r2, [r5, #44]
D/dalvikvm( 1248): 0x42855ae0 (010c): adds r2, r2, #1
D/dalvikvm( 1248): 0x42855ae2 (010e): str r2, [r5, #44]
D/dalvikvm( 1248): -------- dalvik offset: 0x0045 @ goto
D/dalvikvm( 1248): --------
D/dalvikvm( 1248): L0x0029:
D/dalvikvm( 1248): -------- dalvik offset: 0x0029 @ if-ge
D/dalvikvm( 1248): -------- s46(v11_2) s3(v3_0)
D/dalvikvm( 1248): 0x42855ae4 (0110): ldr r0, [r5, #44]
D/dalvikvm( 1248): 0x42855ae6 (0112): ldr r1, [r5, #12]
D/dalvikvm( 1248): 0x42855ae8 (0114): cmp r0, r1
D/dalvikvm( 1248): 0x42855aea (0116): bge 0x42855aee
D/dalvikvm( 1248): 0x42855aec (0118): b 0x42855a08
D/dalvikvm( 1248): -------- exit offset: 0x0046
D/dalvikvm( 1248): 0x42855aee (011a): b 0x42855af8
D/dalvikvm( 1248): -------- reconstruct dalvik PC : 0x42a644d6 @ +0x002b
D/dalvikvm( 1248): 0x42855af0 (011c): ldr r0, [pc, #32]
D/dalvikvm( 1248): Exception_Handling:
D/dalvikvm( 1248): 0x42855af2 (011e): ldr r1, [r6, #84]
D/dalvikvm( 1248): 0x42855af4 (0120): blx r1
D/dalvikvm( 1248): 0x42855af6 (0122): .align4
D/dalvikvm( 1248): -------- chaining cell (normal): 0x0046
D/dalvikvm( 1248): 0x42855af8 (0124): ldr r0, [r6, #76]
D/dalvikvm( 1248): 0x42855afa (0126): blx r0
D/dalvikvm( 1248): 0x42855afc (0128): data 0x450c(17676)
D/dalvikvm( 1248): 0x42855afe (012a): data 0x42a6(17062)
D/dalvikvm( 1248): 0x42855b14 (0140): .word (0x42a644d6)
D/dalvikvm( 1248): End Ljnt/scimark2/SOR;execute, 18 Dalvik instructions