[llvm] [LV][NFC] Remove undef from phi incoming values (PR #163762)
via llvm-commits
llvm-commits at lists.llvm.org
Thu Oct 16 05:51:18 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-transforms
Author: David Sherwood (david-arm)
<details>
<summary>Changes</summary>
Split off from PR #<!-- -->163525, this standalone patch replaces
use of undef as incoming PHI values with zero, in order
to reduce the likelihood of contributors hitting the
`undef deprecator` warning in github.
---
Patch is 42.71 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/163762.diff
21 Files Affected:
- (modified) llvm/test/Transforms/LoopVectorize/2012-10-20-infloop.ll (+1-1)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/pr33053.ll (+4-4)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/pr36032.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll (+4-4)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/arm-ieee-vectorize.ll (+8-8)
- (modified) llvm/test/Transforms/LoopVectorize/ARM/mve-known-trip-count.ll (+1-1)
- (modified) llvm/test/Transforms/LoopVectorize/X86/fp80-widest-type.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/X86/rauw-bug.ll (+4-4)
- (modified) llvm/test/Transforms/LoopVectorize/X86/x86_fp80-interleaved-access.ll (+1-1)
- (modified) llvm/test/Transforms/LoopVectorize/i8-induction.ll (+1-1)
- (modified) llvm/test/Transforms/LoopVectorize/if-pred-stores.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/incorrect-dom-info.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll (+4-4)
- (modified) llvm/test/Transforms/LoopVectorize/middle-block-dbg.ll (+1-1)
- (modified) llvm/test/Transforms/LoopVectorize/multi-use-reduction-bug.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/reduction-inloop.ll (+21-21)
- (modified) llvm/test/Transforms/LoopVectorize/reverse_iter.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/scalable-first-order-recurrence.ll (+9-9)
- (modified) llvm/test/Transforms/LoopVectorize/scev-exitlim-crash.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/select-reduction-start-value-may-be-undef-or-poison.ll (+2-2)
- (modified) llvm/test/Transforms/LoopVectorize/uniform-blend.ll (+3-3)
``````````diff
diff --git a/llvm/test/Transforms/LoopVectorize/2012-10-20-infloop.ll b/llvm/test/Transforms/LoopVectorize/2012-10-20-infloop.ll
index 2b5960eb91e50..90d0db2a9acff 100644
--- a/llvm/test/Transforms/LoopVectorize/2012-10-20-infloop.ll
+++ b/llvm/test/Transforms/LoopVectorize/2012-10-20-infloop.ll
@@ -56,7 +56,7 @@ if.then46: ; preds = %for.body40
br label %for.inc50
for.inc50: ; preds = %if.then46, %for.body40
- %k.1 = phi i32 [ undef, %for.body40 ], [ %inc47, %if.then46 ]
+ %k.1 = phi i32 [ 0, %for.body40 ], [ %inc47, %if.then46 ]
%step.1 = phi i32 [ %step.0121, %for.body40 ], [ %inc47, %if.then46 ]
%indvars.iv.next124 = add i64 %indvars.iv123, 1
%lftr.wideiv = trunc i64 %indvars.iv.next124 to i32
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/pr33053.ll b/llvm/test/Transforms/LoopVectorize/AArch64/pr33053.ll
index 20b536499afa7..7d920472a42f9 100644
--- a/llvm/test/Transforms/LoopVectorize/AArch64/pr33053.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/pr33053.ll
@@ -21,8 +21,8 @@ for.body.lr.ph: ; preds = %entry
for.body: ; preds = %for.body.lr.ph, %for.body
%indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
- %d.043 = phi i16 [ undef, %for.body.lr.ph ], [ %.sink28, %for.body ]
- %c.042 = phi i16 [ undef, %for.body.lr.ph ], [ %c.0., %for.body ]
+ %d.043 = phi i16 [ 0, %for.body.lr.ph ], [ %.sink28, %for.body ]
+ %c.042 = phi i16 [ 0, %for.body.lr.ph ], [ %c.0., %for.body ]
%arrayidx = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
%4 = load i16, ptr %arrayidx, align 2, !tbaa !7
%cmp2 = icmp sgt i16 %c.042, %4
@@ -34,8 +34,8 @@ for.body: ; preds = %for.body.lr.ph, %fo
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
- %c.0.lcssa = phi i16 [ undef, %entry ], [ %c.0., %for.body ]
- %d.0.lcssa = phi i16 [ undef, %entry ], [ %.sink28, %for.body ]
+ %c.0.lcssa = phi i16 [ 0, %entry ], [ %c.0., %for.body ]
+ %d.0.lcssa = phi i16 [ 0, %entry ], [ %.sink28, %for.body ]
%cmp26 = icmp sgt i16 %c.0.lcssa, %d.0.lcssa
%conv27 = zext i1 %cmp26 to i32
ret i32 %conv27
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/pr36032.ll b/llvm/test/Transforms/LoopVectorize/AArch64/pr36032.ll
index 44820e061211a..33ce300d68592 100644
--- a/llvm/test/Transforms/LoopVectorize/AArch64/pr36032.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/pr36032.ll
@@ -18,7 +18,7 @@ define void @_Z1dv() local_unnamed_addr #0 {
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[F_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD5:%.*]], [[FOR_COND_CLEANUP:%.*]] ]
-; CHECK-NEXT: [[G_0:%.*]] = phi i32 [ undef, [[ENTRY]] ], [ [[G_1_LCSSA:%.*]], [[FOR_COND_CLEANUP]] ]
+; CHECK-NEXT: [[G_0:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[G_1_LCSSA:%.*]], [[FOR_COND_CLEANUP]] ]
; CHECK-NEXT: [[CMP12:%.*]] = icmp ult i32 [[G_0]], 4
; CHECK-NEXT: [[CONV:%.*]] = and i32 [[F_0]], 65535
; CHECK-NEXT: br i1 [[CMP12]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP]]
@@ -50,7 +50,7 @@ entry:
for.cond: ; preds = %for.cond.cleanup, %entry
%f.0 = phi i32 [ 0, %entry ], [ %add5, %for.cond.cleanup ]
- %g.0 = phi i32 [ undef, %entry ], [ %g.1.lcssa, %for.cond.cleanup ]
+ %g.0 = phi i32 [ 0, %entry ], [ %g.1.lcssa, %for.cond.cleanup ]
%cmp12 = icmp ult i32 %g.0, 4
%conv = and i32 %f.0, 65535
br i1 %cmp12, label %for.body.lr.ph, label %for.cond.cleanup
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll b/llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll
index cde89763b26c3..37aecc67e0e73 100644
--- a/llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll
@@ -728,8 +728,8 @@ define void @int_float_struct(ptr nocapture readonly %p) #0 {
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
-; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x float> [ insertelement (<vscale x 4 x float> zeroinitializer, float undef, i32 0), [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
-; CHECK-NEXT: [[VEC_PHI1:%.*]] = phi <vscale x 4 x i32> [ insertelement (<vscale x 4 x i32> zeroinitializer, i32 undef, i32 0), [[VECTOR_PH]] ], [ [[TMP6:%.*]], [[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <vscale x 4 x float> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_PHI1:%.*]] = phi <vscale x 4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP6:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[STRUCT_INTFLOAT:%.*]], ptr [[P:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_VEC:%.*]] = load <vscale x 8 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT: [[STRIDED_VEC:%.*]] = call { <vscale x 4 x i32>, <vscale x 4 x i32> } @llvm.vector.deinterleave2.nxv8i32(<vscale x 8 x i32> [[WIDE_VEC]])
@@ -755,8 +755,8 @@ for.cond.cleanup: ; preds = %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
- %SumB.014 = phi float [ undef, %entry ], [ %add3, %for.body ]
- %SumA.013 = phi i32 [ undef, %entry ], [ %add, %for.body ]
+ %SumB.014 = phi float [ 0.0e+00, %entry ], [ %add3, %for.body ]
+ %SumA.013 = phi i32 [ 0, %entry ], [ %add, %for.body ]
%a = getelementptr inbounds %struct.IntFloat, ptr %p, i64 %indvars.iv, i32 0
%load1 = load i32, ptr %a, align 4
%add = add nsw i32 %load1, %SumA.013
diff --git a/llvm/test/Transforms/LoopVectorize/ARM/arm-ieee-vectorize.ll b/llvm/test/Transforms/LoopVectorize/ARM/arm-ieee-vectorize.ll
index 44a48a9c262f5..f3e25633c6cba 100644
--- a/llvm/test/Transforms/LoopVectorize/ARM/arm-ieee-vectorize.ll
+++ b/llvm/test/Transforms/LoopVectorize/ARM/arm-ieee-vectorize.ll
@@ -92,7 +92,7 @@ for.body.preheader: ; preds = %entry
for.body: ; preds = %for.body.preheader, %for.body
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
- %Red.06 = phi i32 [ %add, %for.body ], [ undef, %for.body.preheader ]
+ %Red.06 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %a, i32 %i.07
%0 = load i32, ptr %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, ptr %b, i32 %i.07
@@ -108,7 +108,7 @@ for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
- %Red.0.lcssa = phi i32 [ undef, %entry ], [ %add.lcssa, %for.end.loopexit ]
+ %Red.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ]
ret i32 %Red.0.lcssa
}
@@ -129,7 +129,7 @@ for.body.preheader: ; preds = %entry
for.body: ; preds = %for.body.preheader, %for.body
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
- %Red.06 = phi float [ %add, %for.body ], [ undef, %for.body.preheader ]
+ %Red.06 = phi float [ %add, %for.body ], [ 0.0e+00, %for.body.preheader ]
%arrayidx = getelementptr inbounds float, ptr %a, i32 %i.07
%0 = load float, ptr %arrayidx, align 4
%arrayidx1 = getelementptr inbounds float, ptr %b, i32 %i.07
@@ -145,7 +145,7 @@ for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
- %Red.0.lcssa = phi float [ undef, %entry ], [ %add.lcssa, %for.end.loopexit ]
+ %Red.0.lcssa = phi float [ 0.0e+00, %entry ], [ %add.lcssa, %for.end.loopexit ]
ret float %Red.0.lcssa
}
@@ -252,7 +252,7 @@ for.body.preheader: ; preds = %entry
for.body: ; preds = %for.body.preheader, %for.body
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
- %Red.06 = phi i32 [ %add, %for.body ], [ undef, %for.body.preheader ]
+ %Red.06 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %a, i32 %i.07
%0 = load i32, ptr %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, ptr %b, i32 %i.07
@@ -268,7 +268,7 @@ for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
- %Red.0.lcssa = phi i32 [ undef, %entry ], [ %add.lcssa, %for.end.loopexit ]
+ %Red.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ]
ret i32 %Red.0.lcssa
}
@@ -285,7 +285,7 @@ for.body.preheader: ; preds = %entry
for.body: ; preds = %for.body.preheader, %for.body
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
- %Red.06 = phi float [ %add, %for.body ], [ undef, %for.body.preheader ]
+ %Red.06 = phi float [ %add, %for.body ], [ 0.0e+00, %for.body.preheader ]
%arrayidx = getelementptr inbounds float, ptr %a, i32 %i.07
%0 = load float, ptr %arrayidx, align 4
%arrayidx1 = getelementptr inbounds float, ptr %b, i32 %i.07
@@ -301,7 +301,7 @@ for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
- %Red.0.lcssa = phi float [ undef, %entry ], [ %add.lcssa, %for.end.loopexit ]
+ %Red.0.lcssa = phi float [ 0.0e+00, %entry ], [ %add.lcssa, %for.end.loopexit ]
ret float %Red.0.lcssa
}
diff --git a/llvm/test/Transforms/LoopVectorize/ARM/mve-known-trip-count.ll b/llvm/test/Transforms/LoopVectorize/ARM/mve-known-trip-count.ll
index fe3504bc4b679..23609b1041ae2 100644
--- a/llvm/test/Transforms/LoopVectorize/ARM/mve-known-trip-count.ll
+++ b/llvm/test/Transforms/LoopVectorize/ARM/mve-known-trip-count.ll
@@ -249,7 +249,7 @@ define dso_local i32 @predicated_test(i32 noundef %0, ptr %glob) #0 {
br label %7
7: ; preds = %5, %155
- %8 = phi i32 [ %10, %155 ], [ undef, %5 ]
+ %8 = phi i32 [ %10, %155 ], [ 0, %5 ]
%9 = phi i32 [ %156, %155 ], [ 0, %5 ]
%10 = shl i32 %8, 4
store i32 %10, ptr %6, align 4
diff --git a/llvm/test/Transforms/LoopVectorize/X86/fp80-widest-type.ll b/llvm/test/Transforms/LoopVectorize/X86/fp80-widest-type.ll
index 2ef9d4b40d9a5..3718ad23c0612 100644
--- a/llvm/test/Transforms/LoopVectorize/X86/fp80-widest-type.ll
+++ b/llvm/test/Transforms/LoopVectorize/X86/fp80-widest-type.ll
@@ -14,7 +14,7 @@ define x86_fp80 @test() {
; CHECK-NEXT: br label [[FOR_BODY3_I_3:%.*]]
; CHECK: for.body3.i.3:
; CHECK-NEXT: [[N_ADDR_112_I_3:%.*]] = phi i64 [ [[DEC_I_3:%.*]], [[FOR_BODY3_I_3]] ], [ 24, [[FOO_EXIT:%.*]] ]
-; CHECK-NEXT: [[X_ADDR_111_I_3:%.*]] = phi x86_fp80 [ [[MUL_I_3:%.*]], [[FOR_BODY3_I_3]] ], [ undef, [[FOO_EXIT]] ]
+; CHECK-NEXT: [[X_ADDR_111_I_3:%.*]] = phi x86_fp80 [ [[MUL_I_3:%.*]], [[FOR_BODY3_I_3]] ], [ 0xK00000000000000000000, [[FOO_EXIT]] ]
; CHECK-NEXT: [[MUL_I_3]] = fmul x86_fp80 [[X_ADDR_111_I_3]], 0xK40008000000000000000
; CHECK-NEXT: [[DEC_I_3]] = add nsw i64 [[N_ADDR_112_I_3]], -1
; CHECK-NEXT: [[CMP2_I_3:%.*]] = icmp sgt i64 [[N_ADDR_112_I_3]], 1
@@ -28,7 +28,7 @@ foo.exit:
for.body3.i.3: ; preds = %for.body3.i.3, %foo.exit
%n.addr.112.i.3 = phi i64 [ %dec.i.3, %for.body3.i.3 ], [ 24, %foo.exit ]
- %x.addr.111.i.3 = phi x86_fp80 [ %mul.i.3, %for.body3.i.3 ], [ undef, %foo.exit ]
+ %x.addr.111.i.3 = phi x86_fp80 [ %mul.i.3, %for.body3.i.3 ], [ zeroinitializer, %foo.exit ]
%mul.i.3 = fmul x86_fp80 %x.addr.111.i.3, 0xK40008000000000000000
%dec.i.3 = add nsw i64 %n.addr.112.i.3, -1
%cmp2.i.3 = icmp sgt i64 %n.addr.112.i.3, 1
diff --git a/llvm/test/Transforms/LoopVectorize/X86/rauw-bug.ll b/llvm/test/Transforms/LoopVectorize/X86/rauw-bug.ll
index df1c4f979986c..5321d69a9f5f5 100644
--- a/llvm/test/Transforms/LoopVectorize/X86/rauw-bug.ll
+++ b/llvm/test/Transforms/LoopVectorize/X86/rauw-bug.ll
@@ -21,10 +21,10 @@ while.cond63.preheader.while.end76_crit_edge:
ret void
while.body:
- %d2_fx.015 = phi double [ %sub52, %while.body ], [ undef, %entry ]
- %d2_fy.014 = phi double [ %sub58, %while.body ], [ undef, %entry ]
- %d3_fy.013 = phi double [ %div56, %while.body ], [ undef, %entry ]
- %d3_fx.012 = phi double [ %div50, %while.body ], [ undef, %entry ]
+ %d2_fx.015 = phi double [ %sub52, %while.body ], [ 0.0e+00, %entry ]
+ %d2_fy.014 = phi double [ %sub58, %while.body ], [ 0.0e+00, %entry ]
+ %d3_fy.013 = phi double [ %div56, %while.body ], [ 0.0e+00, %entry ]
+ %d3_fx.012 = phi double [ %div50, %while.body ], [ 0.0e+00, %entry ]
%div50 = fmul double %d3_fx.012, 1.250000e-01
%sub52 = fsub double 0.000000e+00, %div50
%div56 = fmul double %d3_fy.013, 1.250000e-01
diff --git a/llvm/test/Transforms/LoopVectorize/X86/x86_fp80-interleaved-access.ll b/llvm/test/Transforms/LoopVectorize/X86/x86_fp80-interleaved-access.ll
index 368361fd760ec..0f55d79b2d299 100644
--- a/llvm/test/Transforms/LoopVectorize/X86/x86_fp80-interleaved-access.ll
+++ b/llvm/test/Transforms/LoopVectorize/X86/x86_fp80-interleaved-access.ll
@@ -15,7 +15,7 @@ for.cond.cleanup:
for.body:
%i.09 = phi i16 [ 0, %entry ], [ %add3, %for.body ]
- %res.08 = phi x86_fp80 [ undef, %entry ], [ %3, %for.body ]
+ %res.08 = phi x86_fp80 [ zeroinitializer, %entry ], [ %3, %for.body ]
%arrayidx = getelementptr inbounds x86_fp80, ptr %a, i16 %i.09
%0 = load x86_fp80, ptr %arrayidx, align 1
%add = or i16 %i.09, 1
diff --git a/llvm/test/Transforms/LoopVectorize/i8-induction.ll b/llvm/test/Transforms/LoopVectorize/i8-induction.ll
index 220fd64e6a829..712c75d3ed042 100644
--- a/llvm/test/Transforms/LoopVectorize/i8-induction.ll
+++ b/llvm/test/Transforms/LoopVectorize/i8-induction.ll
@@ -20,7 +20,7 @@ scalar.ph:
for.body:
%mul16 = phi i8 [ 0, %scalar.ph ], [ %mul, %for.body ] ; <------- i8 induction var.
- %c.015 = phi i8 [ undef, %scalar.ph ], [ %conv8, %for.body ]
+ %c.015 = phi i8 [ 0, %scalar.ph ], [ %conv8, %for.body ]
%conv2 = sext i8 %c.015 to i32
%tobool = icmp ne i8 %c.015, 0
%.sink = select i1 %tobool, i8 %c.015, i8 %0
diff --git a/llvm/test/Transforms/LoopVectorize/if-pred-stores.ll b/llvm/test/Transforms/LoopVectorize/if-pred-stores.ll
index f7376a0f8e205..c164c4a46bd94 100644
--- a/llvm/test/Transforms/LoopVectorize/if-pred-stores.ll
+++ b/llvm/test/Transforms/LoopVectorize/if-pred-stores.ll
@@ -277,7 +277,7 @@ define void @bug18724(i1 %cond, ptr %ptr, i1 %cond.2, i64 %v.1, i32 %v.2) {
; UNROLL-NOSIMPLIFY-NEXT: [[INEWCHUNKS_2_LCSSA:%.*]] = phi i32 [ [[INEWCHUNKS_2]], [[FOR_INC23]] ], [ [[BIN_RDX]], [[MIDDLE_BLOCK]] ]
; UNROLL-NOSIMPLIFY-NEXT: br label [[FOR_INC26]]
; UNROLL-NOSIMPLIFY: for.inc26:
-; UNROLL-NOSIMPLIFY-NEXT: [[INEWCHUNKS_1_LCSSA:%.*]] = phi i32 [ undef, [[FOR_BODY9]] ], [ [[INEWCHUNKS_2_LCSSA]], [[FOR_INC26_LOOPEXIT]] ]
+; UNROLL-NOSIMPLIFY-NEXT: [[INEWCHUNKS_1_LCSSA:%.*]] = phi i32 [ 0, [[FOR_BODY9]] ], [ [[INEWCHUNKS_2_LCSSA]], [[FOR_INC26_LOOPEXIT]] ]
; UNROLL-NOSIMPLIFY-NEXT: unreachable
;
; VEC-LABEL: @bug18724(
@@ -376,7 +376,7 @@ for.inc23:
br i1 %cmp13, label %for.body14, label %for.inc26
for.inc26:
- %iNewChunks.1.lcssa = phi i32 [ undef, %for.body9 ], [ %iNewChunks.2, %for.inc23 ]
+ %iNewChunks.1.lcssa = phi i32 [ 0, %for.body9 ], [ %iNewChunks.2, %for.inc23 ]
unreachable
}
diff --git a/llvm/test/Transforms/LoopVectorize/incorrect-dom-info.ll b/llvm/test/Transforms/LoopVectorize/incorrect-dom-info.ll
index 9e750022d8c4c..5cf99b8998603 100644
--- a/llvm/test/Transforms/LoopVectorize/incorrect-dom-info.ll
+++ b/llvm/test/Transforms/LoopVectorize/incorrect-dom-info.ll
@@ -53,8 +53,8 @@ thread-pre-split.loopexit: ; preds = %11, %.thread-pre-sp
br i1 false, label %thread-pre-split._crit_edge, label %.lr.ph21
.lr.ph21: ; preds = %26, %thread-pre-split.loopexit, %thread-pre-split.preheader
- %d.020 = phi ptr [ undef, %26 ], [ %d.1.lcssa, %thread-pre-split.loopexit ], [ undef, %thread-pre-split.preheader ]
- %10 = phi i64 [ %28, %26 ], [ undef, %thread-pre-split.loopexit ], [ undef, %thread-pre-split.preheader ]
+ %d.020 = phi ptr [ zeroinitializer, %26 ], [ %d.1.lcssa, %thread-pre-split.loopexit ], [ zeroinitializer, %thread-pre-split.preheader ]
+ %10 = phi i64 [ %28, %26 ], [ zeroinitializer, %thread-pre-split.loopexit ], [ zeroinitializer, %thread-pre-split.preheader ]
br i1 %arg, label %11, label %22
; <label>:11 ; preds = %.lr.ph21
diff --git a/llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll b/llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll
index b4cad1142134c..e72695b4ff12e 100644
--- a/llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll
+++ b/llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll
@@ -791,8 +791,8 @@ define void @int_float_struct(ptr nocapture readonly %A) #0 {
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
-; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ <float undef, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[TMP3:%.*]], [[VECTOR_BODY]] ]
-; CHECK-NEXT: [[VEC_PHI1:%.*]] = phi <4 x i32> [ <i32 undef, i32 0, i32 0, i32 0>, [[VECTOR_PH]] ], [ [[TMP2:%.*]], [[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP3:%.*]], [[VECTOR_BODY]] ]
+; CHECK-NEXT: [[VEC_PHI1:%.*]] = phi <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP2:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[STRUCT_INTFLOAT:%.*]], ptr [[A:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_VEC:%.*]] = load <8 x i32>, ptr [[TMP0]], align 4
; CHECK-NEXT: [[STRIDED_VEC:%.*]] = shufflevector <8 x i32> [[WIDE_VEC]], <8 x i32> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
@@ -822,8 +822,8 @@ for.cond.cleanup: ; preds = %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
- %SumB.014 = phi float [ undef, %entry ], [ %add3, %for.body ]
- %SumA.013 = phi i32 [ undef, %entry ], [ %add, %for.body ]
+ %SumB.014 = phi float [ 0.0e+00, %entry ], [ %add3, %for.body ]
+ %SumA.013 = phi i32 [ 0, %entry ], [ %add, %for.body ]
%a = getelementptr inbounds %struct.IntFloat, ptr %A, i64 %indvars.iv, i32 0
%tmp = load i32, ptr %a, align 4
%add = add nsw i32 %tmp, %SumA.013
diff --git a/llvm/test/Transforms/LoopVectorize/middle-block-dbg.ll b/llvm/test/Transforms/LoopVectorize/middle-block-dbg.ll
index 741ca559343d1..1675a595072fd 100644
--- a/llvm/test/Transforms/LoopVectorize/middle-block-dbg.ll
+++ b/llvm/test/Transforms/LoopVectorize/middle-block-dbg.ll
@@ -48,7 +48,7 @@ for.cond.cleanup.loopexit:
br label %for.cond.cleanup, !dbg !33
for.cond.cleanup:
- %2 = phi i32 [ %.pre, %for.cond.cleanup.loopexit ], [ undef, %entry ], !dbg !33
+ %2 = phi i32 [ %.pre, %for.cond.cleanup.loopexit ], [ 0, %entry ], !dbg !33
%sub = add nsw i32 %0, -5, !dbg !33
%idxprom3 = sext i32 %sub to i64, !dbg !33
%arrayidx4 = getelementptr inbounds i32, ptr %vla, i64 %idxprom3, !dbg !33
diff --git a/llvm/test/Transforms/LoopVectorize/multi-use-reduction-bug.ll b/llvm/test/Transforms/LoopVectorize/multi-use-reduction-bug.ll
index 659dc62e7ab58..20386334da600 100644
--- a/llvm/test/Transforms/LoopVectorize/multi-use-reduction-bug.ll
+++ b/llvm/test/Transforms/LoopVectorize/multi-use-reduction-bug.ll
@@ -22,8 +22,8 @@ entry:
br label %for.body
for.body:
- %inc107 = phi i32 [ undef, %entry ],...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/163762
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