shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/select-cmp-reduction.ll
Florian Hahn 50b9ca4dda
[VPlan] Simplify Plan's entry in removeBranchOnConst. (#154510) 
After https://github.com/llvm/llvm-project/pull/153643, there may be a
BranchOnCond with constant condition in the entry block.

Simplify those in removeBranchOnConst. This removes a number of
redundant conditional branch from entry blocks.

In some cases, it may also make the original scalar loop unreachable,
because we know it will never execute. In that case, we need to remove
the loop from LoopInfo, because all unreachable blocks may dominate each
other, making LoopInfo invalid. In those cases, we can also completely
remove the loop, for which I'll share a follow-up patch.

Depends on https://github.com/llvm/llvm-project/pull/153643.

PR: https://github.com/llvm/llvm-project/pull/154510
2025-09-18 19:25:05 +01:00

428 lines
25 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -p loop-vectorize -mtriple riscv64 -mattr=+v -S < %s | FileCheck %s
define i32 @select_icmp(i32 %x, i32 %y, ptr nocapture readonly %c, i64 %n) {
; CHECK-LABEL: define i32 @select_icmp(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]], ptr readonly captures(none) [[C:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[X]], i64 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 4 x i32> [[BROADCAST_SPLATINSERT]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP14:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP14]])
; CHECK-NEXT: [[TMP7:%.*]] = icmp sge <vscale x 4 x i32> [[WIDE_LOAD]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP8]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP14]])
; CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP14]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP9]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP9]]
; CHECK-NEXT: [[TMP13:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP13]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP8]])
; CHECK-NEXT: [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP11]], i32 [[Y]], i32 0
; CHECK-NEXT: br label %[[FOR_END:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[A:%.*]] = phi i32 [ 0, %[[SCALAR_PH]] ], [ [[COND:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP12:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[TMP12]], [[X]]
; CHECK-NEXT: [[COND]] = select i1 [[CMP1]], i32 [[A]], i32 [[Y]]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: [[COND_LCSSA:%.*]] = phi i32 [ [[COND]], %[[FOR_BODY]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[COND_LCSSA]]
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%a = phi i32 [ 0, %entry], [ %cond, %for.body ]
%arrayidx = getelementptr inbounds i32, ptr %c, i64 %indvars.iv
%0 = load i32, ptr %arrayidx, align 4
%cmp1 = icmp slt i32 %0, %x
%cond = select i1 %cmp1, i32 %a, i32 %y
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %for.end, label %for.body
for.end:
ret i32 %cond
}
define i32 @select_fcmp(float %x, i32 %y, ptr nocapture readonly %c, i64 %n) {
; CHECK-LABEL: define i32 @select_fcmp(
; CHECK-SAME: float [[X:%.*]], i32 [[Y:%.*]], ptr readonly captures(none) [[C:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 4 x float> poison, float [[X]], i64 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 4 x float> [[BROADCAST_SPLATINSERT]], <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP14:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds float, ptr [[C]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x float> @llvm.vp.load.nxv4f32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP14]])
; CHECK-NEXT: [[TMP7:%.*]] = fcmp fast uge <vscale x 4 x float> [[WIDE_LOAD]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP8]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP14]])
; CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP14]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP9]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP9]]
; CHECK-NEXT: [[TMP13:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP13]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP8]])
; CHECK-NEXT: [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP11]], i32 [[Y]], i32 0
; CHECK-NEXT: br label %[[FOR_END:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[A:%.*]] = phi i32 [ 0, %[[SCALAR_PH]] ], [ [[COND:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[C]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP12:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast olt float [[TMP12]], [[X]]
; CHECK-NEXT: [[COND]] = select i1 [[CMP1]], i32 [[A]], i32 [[Y]]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: [[COND_LCSSA:%.*]] = phi i32 [ [[COND]], %[[FOR_BODY]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[COND_LCSSA]]
;
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%a = phi i32 [ 0, %entry], [ %cond, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %c, i64 %indvars.iv
%0 = load float, ptr %arrayidx, align 4
%cmp1 = fcmp fast olt float %0, %x
%cond = select i1 %cmp1, i32 %a, i32 %y
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %n
br i1 %exitcond.not, label %for.end, label %for.body
for.end:
ret i32 %cond
}
define i32 @select_const_i32_from_icmp(ptr nocapture readonly %v, i64 %n) {
; CHECK-LABEL: define i32 @select_const_i32_from_icmp(
; CHECK-SAME: ptr readonly captures(none) [[V:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP21:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[V]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP21]])
; CHECK-NEXT: [[TMP7:%.*]] = icmp ne <vscale x 4 x i32> [[WIDE_LOAD]], splat (i32 3)
; CHECK-NEXT: [[TMP8]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP21]])
; CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP21]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP9]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP9]]
; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP20]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP8]])
; CHECK-NEXT: [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP11]], i32 7, i32 3
; CHECK-NEXT: br label %[[EXIT:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[TMP12:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[TMP18:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP13:%.*]] = phi i32 [ 3, %[[SCALAR_PH]] ], [ [[TMP17:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds i32, ptr [[V]], i64 [[TMP12]]
; CHECK-NEXT: [[TMP15:%.*]] = load i32, ptr [[TMP14]], align 4
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i32 [[TMP15]], 3
; CHECK-NEXT: [[TMP17]] = select i1 [[TMP16]], i32 [[TMP13]], i32 7
; CHECK-NEXT: [[TMP18]] = add nuw nsw i64 [[TMP12]], 1
; CHECK-NEXT: [[TMP19:%.*]] = icmp eq i64 [[TMP18]], [[N]]
; CHECK-NEXT: br i1 [[TMP19]], label %[[EXIT]], label %[[FOR_BODY]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], %[[FOR_BODY]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[DOTLCSSA]]
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%0 = phi i64 [ 0, %entry ], [ %6, %for.body ]
%1 = phi i32 [ 3, %entry ], [ %5, %for.body ]
%2 = getelementptr inbounds i32, ptr %v, i64 %0
%3 = load i32, ptr %2, align 4
%4 = icmp eq i32 %3, 3
%5 = select i1 %4, i32 %1, i32 7
%6 = add nuw nsw i64 %0, 1
%7 = icmp eq i64 %6, %n
br i1 %7, label %exit, label %for.body
exit: ; preds = %for.body
ret i32 %5
}
define i32 @select_i32_from_icmp(ptr nocapture readonly %v, i32 %a, i32 %b, i64 %n) {
; CHECK-LABEL: define i32 @select_i32_from_icmp(
; CHECK-SAME: ptr readonly captures(none) [[V:%.*]], i32 [[A:%.*]], i32 [[B:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP21:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[V]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP21]])
; CHECK-NEXT: [[TMP7:%.*]] = icmp ne <vscale x 4 x i32> [[WIDE_LOAD]], splat (i32 3)
; CHECK-NEXT: [[TMP8]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP21]])
; CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP21]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP9]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP9]]
; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP20]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP8]])
; CHECK-NEXT: [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP11]], i32 [[B]], i32 [[A]]
; CHECK-NEXT: br label %[[EXIT:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[TMP12:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[TMP18:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP13:%.*]] = phi i32 [ [[A]], %[[SCALAR_PH]] ], [ [[TMP17:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds i32, ptr [[V]], i64 [[TMP12]]
; CHECK-NEXT: [[TMP15:%.*]] = load i32, ptr [[TMP14]], align 4
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i32 [[TMP15]], 3
; CHECK-NEXT: [[TMP17]] = select i1 [[TMP16]], i32 [[TMP13]], i32 [[B]]
; CHECK-NEXT: [[TMP18]] = add nuw nsw i64 [[TMP12]], 1
; CHECK-NEXT: [[TMP19:%.*]] = icmp eq i64 [[TMP18]], [[N]]
; CHECK-NEXT: br i1 [[TMP19]], label %[[EXIT]], label %[[FOR_BODY]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], %[[FOR_BODY]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[DOTLCSSA]]
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%0 = phi i64 [ 0, %entry ], [ %6, %for.body ]
%1 = phi i32 [ %a, %entry ], [ %5, %for.body ]
%2 = getelementptr inbounds i32, ptr %v, i64 %0
%3 = load i32, ptr %2, align 4
%4 = icmp eq i32 %3, 3
%5 = select i1 %4, i32 %1, i32 %b
%6 = add nuw nsw i64 %0, 1
%7 = icmp eq i64 %6, %n
br i1 %7, label %exit, label %for.body
exit: ; preds = %for.body
ret i32 %5
}
define i32 @select_const_i32_from_fcmp(ptr nocapture readonly %v, i64 %n) {
; CHECK-LABEL: define i32 @select_const_i32_from_fcmp(
; CHECK-SAME: ptr readonly captures(none) [[V:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP21:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds float, ptr [[V]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x float> @llvm.vp.load.nxv4f32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP21]])
; CHECK-NEXT: [[TMP7:%.*]] = fcmp fast one <vscale x 4 x float> [[WIDE_LOAD]], splat (float 3.000000e+00)
; CHECK-NEXT: [[TMP8]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP21]])
; CHECK-NEXT: [[TMP9:%.*]] = zext i32 [[TMP21]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP9]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP9]]
; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP20]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP8]])
; CHECK-NEXT: [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP11]], i32 1, i32 2
; CHECK-NEXT: br label %[[EXIT:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[TMP12:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[TMP18:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP13:%.*]] = phi i32 [ 2, %[[SCALAR_PH]] ], [ [[TMP17:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds float, ptr [[V]], i64 [[TMP12]]
; CHECK-NEXT: [[TMP15:%.*]] = load float, ptr [[TMP14]], align 4
; CHECK-NEXT: [[TMP16:%.*]] = fcmp fast ueq float [[TMP15]], 3.000000e+00
; CHECK-NEXT: [[TMP17]] = select i1 [[TMP16]], i32 [[TMP13]], i32 1
; CHECK-NEXT: [[TMP18]] = add nuw nsw i64 [[TMP12]], 1
; CHECK-NEXT: [[TMP19:%.*]] = icmp eq i64 [[TMP18]], [[N]]
; CHECK-NEXT: br i1 [[TMP19]], label %[[EXIT]], label %[[FOR_BODY]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], %[[FOR_BODY]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[DOTLCSSA]]
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%0 = phi i64 [ 0, %entry ], [ %6, %for.body ]
%1 = phi i32 [ 2, %entry ], [ %5, %for.body ]
%2 = getelementptr inbounds float, ptr %v, i64 %0
%3 = load float, ptr %2, align 4
%4 = fcmp fast ueq float %3, 3.0
%5 = select i1 %4, i32 %1, i32 1
%6 = add nuw nsw i64 %0, 1
%7 = icmp eq i64 %6, %n
br i1 %7, label %exit, label %for.body
exit: ; preds = %for.body
ret i32 %5
}
define float @select_const_f32_from_icmp(ptr nocapture readonly %v, i64 %n) {
; CHECK-LABEL: define float @select_const_f32_from_icmp(
; CHECK-SAME: ptr readonly captures(none) [[V:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[TMP6:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = phi fast float [ 3.000000e+00, %[[ENTRY]] ], [ [[TMP5:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[V]], i64 [[TMP0]]
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP2]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 3
; CHECK-NEXT: [[TMP5]] = select fast i1 [[TMP4]], float [[TMP1]], float 7.000000e+00
; CHECK-NEXT: [[TMP6]] = add nuw nsw i64 [[TMP0]], 1
; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i64 [[TMP6]], [[N]]
; CHECK-NEXT: br i1 [[TMP7]], label %[[EXIT:.*]], label %[[FOR_BODY]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi float [ [[TMP5]], %[[FOR_BODY]] ]
; CHECK-NEXT: ret float [[DOTLCSSA]]
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%0 = phi i64 [ 0, %entry ], [ %6, %for.body ]
%1 = phi fast float [ 3.0, %entry ], [ %5, %for.body ]
%2 = getelementptr inbounds i32, ptr %v, i64 %0
%3 = load i32, ptr %2, align 4
%4 = icmp eq i32 %3, 3
%5 = select fast i1 %4, float %1, float 7.0
%6 = add nuw nsw i64 %0, 1
%7 = icmp eq i64 %6, %n
br i1 %7, label %exit, label %for.body
exit: ; preds = %for.body
ret float %5
}
define i32 @pred_select_const_i32_from_icmp(ptr noalias nocapture readonly %src1, ptr noalias nocapture readonly %src2, i64 %n) {
; CHECK-LABEL: define i32 @pred_select_const_i32_from_icmp(
; CHECK-SAME: ptr noalias readonly captures(none) [[SRC1:%.*]], ptr noalias readonly captures(none) [[SRC2:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
; CHECK: [[VECTOR_BODY]]:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_EVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[PREDPHI:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[AVL:%.*]] = phi i64 [ [[N]], %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP17:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[SRC1]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr align 4 [[TMP6]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP17]])
; CHECK-NEXT: [[TMP7:%.*]] = icmp sgt <vscale x 4 x i32> [[WIDE_LOAD]], splat (i32 35)
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr i32, ptr [[SRC2]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr align 4 [[TMP8]], <vscale x 4 x i1> [[TMP7]], i32 [[TMP17]])
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq <vscale x 4 x i32> [[WIDE_MASKED_LOAD]], splat (i32 2)
; CHECK-NEXT: [[TMP10:%.*]] = or <vscale x 4 x i1> [[VEC_PHI]], [[TMP9]]
; CHECK-NEXT: [[PREDPHI1:%.*]] = select <vscale x 4 x i1> [[TMP7]], <vscale x 4 x i1> [[TMP10]], <vscale x 4 x i1> [[VEC_PHI]]
; CHECK-NEXT: [[PREDPHI]] = call <vscale x 4 x i1> @llvm.vp.merge.nxv4i1(<vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> [[PREDPHI1]], <vscale x 4 x i1> [[VEC_PHI]], i32 [[TMP17]])
; CHECK-NEXT: [[TMP21:%.*]] = zext i32 [[TMP17]] to i64
; CHECK-NEXT: [[INDEX_EVL_NEXT]] = add i64 [[TMP21]], [[INDEX]]
; CHECK-NEXT: [[AVL_NEXT]] = sub nuw i64 [[AVL]], [[TMP21]]
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i64 [[AVL_NEXT]], 0
; CHECK-NEXT: br i1 [[TMP16]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK: [[MIDDLE_BLOCK]]:
; CHECK-NEXT: [[TMP12:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[PREDPHI]])
; CHECK-NEXT: [[TMP13:%.*]] = freeze i1 [[TMP12]]
; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP13]], i32 1, i32 0
; CHECK-NEXT: br label %[[FOR_END_LOOPEXIT:.*]]
; CHECK: [[SCALAR_PH:.*]]:
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[I_013:%.*]] = phi i64 [ [[INC:%.*]], %[[FOR_INC:.*]] ], [ 0, %[[SCALAR_PH]] ]
; CHECK-NEXT: [[R_012:%.*]] = phi i32 [ [[R_1:%.*]], %[[FOR_INC]] ], [ 0, %[[SCALAR_PH]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[SRC1]], i64 [[I_013]]
; CHECK-NEXT: [[TMP14:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[TMP14]], 35
; CHECK-NEXT: br i1 [[CMP1]], label %[[IF_THEN:.*]], label %[[FOR_INC]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[SRC2]], i64 [[I_013]]
; CHECK-NEXT: [[TMP15:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i32 [[TMP15]], 2
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[CMP3]], i32 1, i32 [[R_012]]
; CHECK-NEXT: br label %[[FOR_INC]]
; CHECK: [[FOR_INC]]:
; CHECK-NEXT: [[R_1]] = phi i32 [ [[R_012]], %[[FOR_BODY]] ], [ [[SPEC_SELECT]], %[[IF_THEN]] ]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_013]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INC]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[FOR_END_LOOPEXIT]], label %[[FOR_BODY]]
; CHECK: [[FOR_END_LOOPEXIT]]:
; CHECK-NEXT: [[R_1_LCSSA:%.*]] = phi i32 [ [[R_1]], %[[FOR_INC]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i32 [[R_1_LCSSA]]
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.inc
%i.013 = phi i64 [ %inc, %for.inc ], [ 0, %entry ]
%r.012 = phi i32 [ %r.1, %for.inc ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, ptr %src1, i64 %i.013
%0 = load i32, ptr %arrayidx, align 4
%cmp1 = icmp sgt i32 %0, 35
br i1 %cmp1, label %if.then, label %for.inc
if.then: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, ptr %src2, i64 %i.013
%1 = load i32, ptr %arrayidx2, align 4
%cmp3 = icmp eq i32 %1, 2
%spec.select = select i1 %cmp3, i32 1, i32 %r.012
br label %for.inc
for.inc: ; preds = %if.then, %for.body
%r.1 = phi i32 [ %r.012, %for.body ], [ %spec.select, %if.then ]
%inc = add nuw nsw i64 %i.013, 1
%exitcond.not = icmp eq i64 %inc, %n
br i1 %exitcond.not, label %for.end.loopexit, label %for.body
for.end.loopexit: ; preds = %for.inc
%r.1.lcssa = phi i32 [ %r.1, %for.inc ]
ret i32 %r.1.lcssa
}
Reference in New Issue View Git Blame Copy Permalink