RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-24 21:42:54 +02:00
Code Issues Projects Releases Wiki Activity
68f80deaba
llvm-mirror/test/Transforms/LoopUnroll/runtime-loop.ll

121 lines
4.2 KiB
LLVM
Raw Normal View History

Add -unroll-runtime for unrolling loops with run-time trip counts. Patch by Brendon Cahoon! This extends the existing LoopUnroll and LoopUnrollPass. Brendon measured no regressions in the llvm test suite with -unroll-runtime enabled. This implementation works by using the existing loop unrolling code to unroll the loop by a power-of-two (default 8). It generates an if-then-else sequence of code prior to the loop to execute the extra iterations before entering the unrolled loop. llvm-svn: 146245
2011-12-09 07:19:40 +01:00
; RUN: opt < %s -S -loop-unroll -unroll-runtime=true | FileCheck %s
; Tests for unrolling loops with run-time trip counts
LoopUnrollRuntime: Check for overflow in the trip count calculation. Fixes PR19823. llvm-svn: 211436
2014-06-21 15:46:25 +02:00
; CHECK: %xtraiter = and i32 %n
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
; CHECK: %lcmp.mod = icmp ne i32 %xtraiter, 0
; CHECK: %lcmp.overflow = icmp eq i32 %n, 0
; CHECK: %lcmp.or = or i1 %lcmp.overflow, %lcmp.mod
; CHECK: br i1 %lcmp.or, label %for.body.prol, label %for.body.preheader.split
LoopUnrollRuntime: Check for overflow in the trip count calculation. Fixes PR19823. llvm-svn: 211436
2014-06-21 15:46:25 +02:00
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
; CHECK: for.body.prol:
; CHECK: %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %for.body.prol ], [ 0, %for.body.preheader ]
; CHECK: %prol.iter.sub = sub i32 %prol.iter, 1
; CHECK: %prol.iter.cmp = icmp ne i32 %prol.iter.sub, 0
; CHECK: br i1 %prol.iter.cmp, label %for.body.prol, label %for.body.preheader.split, !llvm.loop !0
Add -unroll-runtime for unrolling loops with run-time trip counts. Patch by Brendon Cahoon! This extends the existing LoopUnroll and LoopUnrollPass. Brendon measured no regressions in the llvm test suite with -unroll-runtime enabled. This implementation works by using the existing loop unrolling code to unroll the loop by a power-of-two (default 8). It generates an if-then-else sequence of code prior to the loop to execute the extra iterations before entering the unrolled loop. llvm-svn: 146245
2011-12-09 07:19:40 +01:00
define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly {
entry:
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %for.end, label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
%sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%add = add nsw i32 %0, %sum.02
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
ret i32 %sum.0.lcssa
}
; Still try to completely unroll loops with compile-time trip counts
; even if the -unroll-runtime is specified
; CHECK: for.body:
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
; CHECK-NOT: for.body.prol:
Add -unroll-runtime for unrolling loops with run-time trip counts. Patch by Brendon Cahoon! This extends the existing LoopUnroll and LoopUnrollPass. Brendon measured no regressions in the llvm test suite with -unroll-runtime enabled. This implementation works by using the existing loop unrolling code to unroll the loop by a power-of-two (default 8). It generates an if-then-else sequence of code prior to the loop to execute the extra iterations before entering the unrolled loop. llvm-svn: 146245
2011-12-09 07:19:40 +01:00
define i32 @test1(i32* nocapture %a) nounwind uwtable readonly {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%sum.01 = phi i32 [ 0, %entry ], [ %add, %for.body ]
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
%0 = load i32* %arrayidx, align 4
%add = add nsw i32 %0, %sum.01
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 5
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret i32 %add
}
; This is test 2007-05-09-UnknownTripCount.ll which can be unrolled now
; if the -unroll-runtime option is turned on
; CHECK: bb72.2:
define void @foo(i32 %trips) {
entry:
br label %cond_true.outer
cond_true.outer:
%indvar1.ph = phi i32 [ 0, %entry ], [ %indvar.next2, %bb72 ]
br label %bb72
bb72:
%indvar.next2 = add i32 %indvar1.ph, 1
%exitcond3 = icmp eq i32 %indvar.next2, %trips
br i1 %exitcond3, label %cond_true138, label %cond_true.outer
cond_true138:
ret void
}
; Test run-time unrolling for a loop that counts down by -2.
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
; CHECK: for.body.prol:
; CHECK: br i1 %prol.iter.cmp, label %for.body.prol, label %for.body.preheader.split
Add -unroll-runtime for unrolling loops with run-time trip counts. Patch by Brendon Cahoon! This extends the existing LoopUnroll and LoopUnrollPass. Brendon measured no regressions in the llvm test suite with -unroll-runtime enabled. This implementation works by using the existing loop unrolling code to unroll the loop by a power-of-two (default 8). It generates an if-then-else sequence of code prior to the loop to execute the extra iterations before entering the unrolled loop. llvm-svn: 146245
2011-12-09 07:19:40 +01:00
define zeroext i16 @down(i16* nocapture %p, i32 %len) nounwind uwtable readonly {
entry:
%cmp2 = icmp eq i32 %len, 0
br i1 %cmp2, label %for.end, label %for.body
for.body: ; preds = %for.body, %entry
%p.addr.05 = phi i16* [ %incdec.ptr, %for.body ], [ %p, %entry ]
%len.addr.04 = phi i32 [ %sub, %for.body ], [ %len, %entry ]
%res.03 = phi i32 [ %add, %for.body ], [ 0, %entry ]
%incdec.ptr = getelementptr inbounds i16* %p.addr.05, i64 1
%0 = load i16* %p.addr.05, align 2
%conv = zext i16 %0 to i32
%add = add i32 %conv, %res.03
%sub = add nsw i32 %len.addr.04, -2
%cmp = icmp eq i32 %sub, 0
br i1 %cmp, label %for.cond.for.end_crit_edge, label %for.body
for.cond.for.end_crit_edge: ; preds = %for.body
%phitmp = trunc i32 %add to i16
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
%res.0.lcssa = phi i16 [ %phitmp, %for.cond.for.end_crit_edge ], [ 0, %entry ]
ret i16 %res.0.lcssa
}
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
IR: Add 'distinct' MDNodes to bitcode and assembly Propagate whether `MDNode`s are 'distinct' through the other types of IR (assembly and bitcode). This adds the `distinct` keyword to assembly. Currently, no one actually calls `MDNode::getDistinct()`, so these nodes only get created for: - self-references, which are never uniqued, and - nodes whose operands are replaced that hit a uniquing collision. The concept of distinct nodes is still not quite first-class, since distinct-ness doesn't yet survive across `MapMetadata()`. Part of PR22111. llvm-svn: 225474
2015-01-08 23:38:29 +01:00
; CHECK: !0 = distinct !{!0, !1}
IR: Make metadata typeless in assembly Now that `Metadata` is typeless, reflect that in the assembly. These are the matching assembly changes for the metadata/value split in r223802. - Only use the `metadata` type when referencing metadata from a call intrinsic -- i.e., only when it's used as a `Value`. - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode` when referencing it from call intrinsics. So, assembly like this: define @foo(i32 %v) { call void @llvm.foo(metadata !{i32 %v}, metadata !0) call void @llvm.foo(metadata !{i32 7}, metadata !0) call void @llvm.foo(metadata !1, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{metadata !3}, metadata !0) ret void, !bar !2 } !0 = metadata !{metadata !2} !1 = metadata !{i32* @global} !2 = metadata !{metadata !3} !3 = metadata !{} turns into this: define @foo(i32 %v) { call void @llvm.foo(metadata i32 %v, metadata !0) call void @llvm.foo(metadata i32 7, metadata !0) call void @llvm.foo(metadata i32* @global, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{!3}, metadata !0) ret void, !bar !2 } !0 = !{!2} !1 = !{i32* @global} !2 = !{!3} !3 = !{} I wrote an upgrade script that handled almost all of the tests in llvm and many of the tests in cfe (even handling many `CHECK` lines). I've attached it (or will attach it in a moment if you're speedy) to PR21532 to help everyone update their out-of-tree testcases. This is part of PR21532. llvm-svn: 224257
2014-12-15 20:07:53 +01:00
; CHECK: !1 = !{!"llvm.loop.unroll.disable"}
Use a loop to simplify the runtime unrolling prologue. Runtime unrolling will create a prologue to execute the extra iterations which is can't divided by the unroll factor. It generates an if-then-else sequence to jump into a factor -1 times unrolled loop body, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: if (extraiters == loopfactor) jump L1 if (extraiters == loopfactor-1) jump L2 ... L1: LoopBody; L2: LoopBody; ... if tripcount < loopfactor jump End Loop: ... End: It means if the unroll factor is 4, the loop body will be 7 times unrolled, 3 are in loop prologue, and 4 are in the loop. This commit is to use a loop to execute the extra iterations in prologue, like extraiters = tripcount % loopfactor if (extraiters == 0) jump Loop: else jump Prol Prol: LoopBody; extraiters -= 1 // Omitted if unroll factor is 2. if (extraiters != 0) jump Prol: // Omitted if unroll factor is 2. if (tripcount < loopfactor) jump End Loop: ... End: Then when unroll factor is 4, the loop body will be copied by only 5 times, 1 in the prologue loop, 4 in the original loop. And if the unroll factor is 2, new loop won't be created, just as the original solution. llvm-svn: 218604
2014-09-29 13:15:00 +02:00
Reference in New Issue Copy Permalink