mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-28 04:33:05 +00:00
cfb121f286
According to a previous FIXME comment we now not only look at MBB
successors, but also handle code sinking past them:
x = computation
if () {} else {}
use x
The instruction could be sunk over the whole diamond for the
if/then/else (or loop, etc), allowing it to be sunk into other blocks
after that.
Modified test added in r204522, due to one spill less present.
Minor fixes in comments.
Patch provided by Jonas Paulsson. Reviewed by Hal Finkel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223350 91177308-0d34-0410-b5e6-96231b3b80d8
389 lines
13 KiB
LLVM
389 lines
13 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-macosx -regalloc=greedy | FileCheck %s
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; This testing case is reduced from 254.gap SyFgets funciton.
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; We make sure a spill is not hoisted to a hotter outer loop.
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%struct.TMP.1 = type { %struct.TMP.2*, %struct.TMP.2*, [1024 x i8] }
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%struct.TMP.2 = type { i8*, i32, i32, i16, i16, %struct.TMP.3, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.TMP.3, %struct.TMP.4*, i32, [3 x i8], [1 x i8], %struct.TMP.3, i32, i64 }
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%struct.TMP.4 = type opaque
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%struct.TMP.3 = type { i8*, i32 }
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@syBuf = external global [16 x %struct.TMP.1], align 16
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@syHistory = external global [8192 x i8], align 16
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@SyFgets.yank = external global [512 x i8], align 16
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@syCTRO = external global i32, align 4
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; CHECK-LABEL: SyFgets
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define i8* @SyFgets(i8* %line, i64 %length, i64 %fid) {
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entry:
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%sub.ptr.rhs.cast646 = ptrtoint i8* %line to i64
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%old = alloca [512 x i8], align 16
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%0 = getelementptr inbounds [512 x i8]* %old, i64 0, i64 0
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switch i64 %fid, label %if.then [
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i64 2, label %if.end
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i64 0, label %if.end
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]
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if.then:
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br label %cleanup
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if.end:
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switch i64 undef, label %if.end25 [
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i64 0, label %if.then4
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i64 1, label %land.lhs.true14
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]
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if.then4:
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br i1 undef, label %SyTime.exit, label %if.then.i
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if.then.i:
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unreachable
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SyTime.exit:
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br i1 undef, label %SyTime.exit2681, label %if.then.i2673
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if.then.i2673:
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unreachable
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SyTime.exit2681:
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br label %cleanup
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land.lhs.true14:
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unreachable
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if.end25:
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br i1 undef, label %SyTime.exit2720, label %if.then.i2712
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if.then.i2712:
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unreachable
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SyTime.exit2720:
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%add.ptr = getelementptr [512 x i8]* %old, i64 0, i64 512
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%cmp293427 = icmp ult i8* %0, %add.ptr
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br i1 %cmp293427, label %for.body.lr.ph, label %while.body.preheader
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for.body.lr.ph:
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call void @llvm.memset.p0i8.i64(i8* undef, i8 32, i64 512, i32 16, i1 false)
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br label %while.body.preheader
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while.body.preheader:
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%add.ptr1603 = getelementptr [512 x i8]* null, i64 0, i64 512
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%echo.i3101 = getelementptr [16 x %struct.TMP.1]* @syBuf, i64 0, i64 %fid, i32 1
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%1 = xor i64 %sub.ptr.rhs.cast646, -1
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br label %do.body
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do.body:
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%ch2.0 = phi i32 [ 0, %while.body.preheader ], [ %ch.12.ch2.12, %do.body ]
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%rep.0 = phi i32 [ 1, %while.body.preheader ], [ %rep.6, %do.body ]
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store i32 0, i32* @syCTRO, align 4, !tbaa !1
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%ch.0.ch2.0 = select i1 undef, i32 14, i32 %ch2.0
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%ch2.2 = select i1 undef, i32 0, i32 %ch.0.ch2.0
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%ch.2.ch2.2 = select i1 undef, i32 0, i32 %ch2.2
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%ch2.4 = select i1 undef, i32 278, i32 %ch.2.ch2.2
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%ch2.5 = select i1 undef, i32 0, i32 %ch2.4
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%rep.2 = select i1 undef, i32 undef, i32 %rep.0
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%ch.5.ch2.5 = select i1 undef, i32 undef, i32 %ch2.5
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%ch2.7 = select i1 undef, i32 0, i32 %ch.5.ch2.5
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%rep.3 = select i1 undef, i32 undef, i32 %rep.2
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%ch.7.ch2.7 = select i1 false, i32 0, i32 %ch2.7
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%mul98.rep.3 = select i1 false, i32 0, i32 %rep.3
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%ch2.9 = select i1 undef, i32 undef, i32 %ch.7.ch2.7
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%rep.5 = select i1 undef, i32 undef, i32 %mul98.rep.3
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%ch2.10 = select i1 false, i32 undef, i32 %ch2.9
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%rep.6 = select i1 false, i32 undef, i32 %rep.5
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%isdigittmp = add i32 %ch2.10, -48
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%isdigit = icmp ult i32 %isdigittmp, 10
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%cmp119 = icmp eq i32 undef, 22
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%or.cond1875 = and i1 %isdigit, %cmp119
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%ch.10.ch2.10 = select i1 %or.cond1875, i32 undef, i32 %ch2.10
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%.ch.10 = select i1 %or.cond1875, i32 0, i32 undef
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%ch2.12 = select i1 undef, i32 %.ch.10, i32 %ch.10.ch2.10
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%ch.12 = select i1 undef, i32 0, i32 %.ch.10
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%ch.12.ch2.12 = select i1 false, i32 %ch.12, i32 %ch2.12
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%.ch.12 = select i1 false, i32 0, i32 %ch.12
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%cmp147 = icmp eq i32 %.ch.12, 0
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br i1 %cmp147, label %do.body, label %do.end
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do.end:
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%cmp164 = icmp eq i32 %ch.12.ch2.12, 21
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%mul167 = shl i32 %rep.6, 2
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%rep.8 = select i1 %cmp164, i32 %mul167, i32 %rep.6
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%..ch.19 = select i1 false, i32 2, i32 0
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br i1 undef, label %while.body200, label %while.end1465
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while.body200:
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%dec3386.in = phi i32 [ %dec3386, %while.cond197.backedge ], [ %rep.8, %do.end ]
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%oldc.13384 = phi i32 [ %oldc.1.be, %while.cond197.backedge ], [ 0, %do.end ]
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%ch.213379 = phi i32 [ %last.1.be, %while.cond197.backedge ], [ %..ch.19, %do.end ]
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%last.13371 = phi i32 [ %last.1.be, %while.cond197.backedge ], [ 0, %do.end ]
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%dec3386 = add i32 %dec3386.in, -1
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switch i32 %ch.213379, label %sw.default [
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i32 1, label %while.cond201.preheader
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i32 322, label %sw.bb206
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i32 354, label %sw.bb206
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i32 2, label %sw.bb243
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i32 364, label %sw.bb1077
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i32 326, label %sw.bb256
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i32 358, label %sw.bb256
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i32 341, label %sw.bb979
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i32 323, label %while.cond1037.preheader
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i32 373, label %sw.bb979
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i32 4, label %if.then1477
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i32 332, label %sw.bb1077
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i32 11, label %for.cond357
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i32 355, label %while.cond1037.preheader
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i32 324, label %sw.bb474
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i32 356, label %sw.bb474
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i32 20, label %sw.bb566
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i32 -1, label %while.cond197.backedge
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i32 268, label %sw.bb1134
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i32 16, label %while.cond635.preheader
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i32 18, label %sw.bb956
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i32 316, label %while.cond864
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]
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while.cond1037.preheader:
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%cmp10393273 = icmp eq i8 undef, 0
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br i1 %cmp10393273, label %if.end1070, label %land.rhs1041
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while.cond635.preheader:
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br i1 undef, label %for.body643.us, label %while.cond661
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for.body643.us:
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br label %for.body643.us
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while.cond201.preheader:
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%umax = select i1 false, i64 undef, i64 %1
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%2 = xor i64 %umax, -1
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%3 = inttoptr i64 %2 to i8*
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br label %while.cond197.backedge
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sw.bb206:
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br label %while.cond197.backedge
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sw.bb243:
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br label %while.cond197.backedge
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sw.bb256:
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br label %while.cond197.backedge
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while.cond197.backedge:
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%last.1.be = phi i32 [ %ch.213379, %sw.default ], [ -1, %while.body200 ], [ %ch.213379, %sw.bb1077 ], [ %ch.213379, %sw.bb979 ], [ 18, %sw.bb956 ], [ 20, %sw.bb566 ], [ %ch.213379, %for.end552 ], [ %ch.213379, %sw.bb256 ], [ 2, %sw.bb243 ], [ 1, %while.cond201.preheader ], [ 268, %for.cond1145.preheader ], [ %ch.213379, %sw.bb206 ]
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%oldc.1.be = phi i32 [ %oldc.13384, %sw.default ], [ %oldc.13384, %while.body200 ], [ %oldc.13384, %sw.bb1077 ], [ %oldc.13384, %sw.bb979 ], [ %oldc.13384, %sw.bb956 ], [ %oldc.13384, %sw.bb566 ], [ %oldc.13384, %for.end552 ], [ %oldc.13384, %sw.bb256 ], [ %oldc.13384, %sw.bb243 ], [ %oldc.13384, %while.cond201.preheader ], [ 0, %for.cond1145.preheader ], [ %oldc.13384, %sw.bb206 ]
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%cmp198 = icmp sgt i32 %dec3386, 0
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br i1 %cmp198, label %while.body200, label %while.end1465
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for.cond357:
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br label %for.cond357
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sw.bb474:
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%cmp476 = icmp eq i8 undef, 0
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br i1 %cmp476, label %if.end517, label %do.body479.preheader
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do.body479.preheader:
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%cmp4833314 = icmp eq i8 undef, 0
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br i1 %cmp4833314, label %if.end517, label %land.rhs485
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land.rhs485:
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%incdec.ptr4803316 = phi i8* [ %incdec.ptr480, %do.body479.backedge.land.rhs485_crit_edge ], [ undef, %do.body479.preheader ]
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%isascii.i.i27763151 = icmp sgt i8 undef, -1
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br i1 %isascii.i.i27763151, label %cond.true.i.i2780, label %cond.false.i.i2782
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cond.true.i.i2780:
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br i1 undef, label %land.lhs.true490, label %lor.rhs500
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cond.false.i.i2782:
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unreachable
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land.lhs.true490:
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br i1 false, label %lor.rhs500, label %do.body479.backedge
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lor.rhs500:
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; CHECK: lor.rhs500
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; Make sure that we don't hoist the spill to outer loops.
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; CHECK: movq %r{{.*}}, {{[0-9]+}}(%rsp)
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; CHECK: callq {{.*}}maskrune
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%call3.i.i2792 = call i32 @__maskrune(i32 undef, i64 256)
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br i1 undef, label %land.lhs.true504, label %do.body479.backedge
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land.lhs.true504:
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br i1 undef, label %do.body479.backedge, label %if.end517
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do.body479.backedge:
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%incdec.ptr480 = getelementptr i8* %incdec.ptr4803316, i64 1
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%cmp483 = icmp eq i8 undef, 0
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br i1 %cmp483, label %if.end517, label %do.body479.backedge.land.rhs485_crit_edge
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do.body479.backedge.land.rhs485_crit_edge:
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br label %land.rhs485
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if.end517:
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%q.4 = phi i8* [ undef, %sw.bb474 ], [ undef, %do.body479.preheader ], [ %incdec.ptr480, %do.body479.backedge ], [ %incdec.ptr4803316, %land.lhs.true504 ]
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switch i32 %last.13371, label %if.then532 [
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i32 383, label %for.cond534
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i32 356, label %for.cond534
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i32 324, label %for.cond534
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i32 24, label %for.cond534
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i32 11, label %for.cond534
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]
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if.then532:
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store i8 0, i8* getelementptr inbounds ([512 x i8]* @SyFgets.yank, i64 0, i64 0), align 16, !tbaa !5
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br label %for.cond534
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for.cond534:
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%cmp536 = icmp eq i8 undef, 0
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br i1 %cmp536, label %for.cond542.preheader, label %for.cond534
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for.cond542.preheader:
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br i1 undef, label %for.body545, label %for.end552
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for.body545:
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br i1 undef, label %for.end552, label %for.body545
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for.end552:
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%s.2.lcssa = phi i8* [ undef, %for.cond542.preheader ], [ %q.4, %for.body545 ]
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%sub.ptr.lhs.cast553 = ptrtoint i8* %s.2.lcssa to i64
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%sub.ptr.sub555 = sub i64 %sub.ptr.lhs.cast553, 0
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%arrayidx556 = getelementptr i8* null, i64 %sub.ptr.sub555
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store i8 0, i8* %arrayidx556, align 1, !tbaa !5
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br label %while.cond197.backedge
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sw.bb566:
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br label %while.cond197.backedge
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while.cond661:
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br label %while.cond661
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while.cond864:
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br label %while.cond864
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sw.bb956:
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br i1 undef, label %if.then959, label %while.cond197.backedge
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if.then959:
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br label %while.cond962
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while.cond962:
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br label %while.cond962
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sw.bb979:
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br label %while.cond197.backedge
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land.rhs1041:
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unreachable
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if.end1070:
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br label %sw.bb1077
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sw.bb1077:
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br label %while.cond197.backedge
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sw.bb1134:
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br i1 false, label %for.body1139, label %for.cond1145.preheader
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for.cond1145.preheader:
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br i1 %cmp293427, label %for.body1150.lr.ph, label %while.cond197.backedge
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for.body1150.lr.ph:
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unreachable
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for.body1139:
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unreachable
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sw.default:
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br label %while.cond197.backedge
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while.end1465:
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%oldc.1.lcssa = phi i32 [ 0, %do.end ], [ %oldc.1.be, %while.cond197.backedge ]
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%ch.21.lcssa = phi i32 [ %..ch.19, %do.end ], [ %last.1.be, %while.cond197.backedge ]
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switch i32 %ch.21.lcssa, label %for.cond1480.preheader [
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i32 -1, label %if.then1477
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i32 15, label %if.then1477
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i32 13, label %if.then1477
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i32 10, label %if.then1477
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]
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for.cond1480.preheader:
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br i1 undef, label %for.body1606.lr.ph, label %for.end1609
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if.then1477:
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%p.1.lcssa3539 = phi i8* [ null, %while.end1465 ], [ null, %while.end1465 ], [ null, %while.end1465 ], [ null, %while.end1465 ], [ %line, %while.body200 ]
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%call1.i3057 = call i64 @"\01_write"(i32 undef, i8* undef, i64 1)
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%sub.ptr.lhs.cast1717 = ptrtoint i8* %p.1.lcssa3539 to i64
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%sub.ptr.sub1719 = sub i64 %sub.ptr.lhs.cast1717, %sub.ptr.rhs.cast646
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%idx.neg1727 = sub i64 0, %sub.ptr.sub1719
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br label %for.body1723
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for.body1606.lr.ph:
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br label %for.end1609
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for.end1609:
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br i1 undef, label %for.cond1659.preheader, label %land.lhs.true1614
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land.lhs.true1614:
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br label %for.cond1659.preheader
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for.cond1659.preheader:
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%cmp16623414 = icmp ult i8* undef, %add.ptr1603
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br i1 %cmp16623414, label %for.body1664.lr.ph, label %while.body1703.lr.ph
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for.body1664.lr.ph:
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%cmp16773405 = icmp slt i64 undef, undef
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br i1 %cmp16773405, label %while.body1679, label %while.cond1683.preheader
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while.body1703.lr.ph:
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unreachable
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while.cond1683.preheader:
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br i1 undef, label %while.body1691, label %while.end1693
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while.body1679:
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%oldc.43406 = phi i32 [ %inc, %syEchoch.exit3070 ], [ %oldc.1.lcssa, %for.body1664.lr.ph ]
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%4 = load %struct.TMP.2** %echo.i3101, align 8, !tbaa !6
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%call.i3062 = call i32 @fileno(%struct.TMP.2* %4)
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br i1 undef, label %if.then.i3069, label %syEchoch.exit3070
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if.then.i3069:
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br label %syEchoch.exit3070
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syEchoch.exit3070:
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%inc = add i32 %oldc.43406, 1
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%conv1672 = sext i32 %inc to i64
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%cmp1677 = icmp slt i64 %conv1672, undef
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br i1 %cmp1677, label %while.body1679, label %while.cond1683.preheader
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while.body1691:
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unreachable
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while.end1693:
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unreachable
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for.body1723:
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%q.303203 = phi i8* [ getelementptr inbounds ([8192 x i8]* @syHistory, i64 0, i64 8189), %if.then1477 ], [ %incdec.ptr1730, %for.body1723 ]
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%add.ptr1728 = getelementptr i8* %q.303203, i64 %idx.neg1727
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%5 = load i8* %add.ptr1728, align 1, !tbaa !5
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%incdec.ptr1730 = getelementptr i8* %q.303203, i64 -1
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br label %for.body1723
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cleanup:
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ret i8* undef
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}
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declare i32 @fileno(%struct.TMP.2* nocapture)
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declare i64 @"\01_write"(i32, i8*, i64)
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declare i32 @__maskrune(i32, i64)
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1)
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!llvm.ident = !{!0}
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!0 = metadata !{metadata !"clang version 3.5.0 (trunk 204257)"}
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!1 = metadata !{metadata !2, metadata !2, i64 0}
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!2 = metadata !{metadata !"int", metadata !3, i64 0}
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|
!3 = metadata !{metadata !"omnipotent char", metadata !4, i64 0}
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!4 = metadata !{metadata !"Simple C/C++ TBAA"}
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!5 = metadata !{metadata !3, metadata !3, i64 0}
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!6 = metadata !{metadata !7, metadata !8, i64 8}
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!7 = metadata !{metadata !"", metadata !8, i64 0, metadata !8, i64 8, metadata !3, i64 16}
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!8 = metadata !{metadata !"any pointer", metadata !3, i64 0}
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