[llvm] [LoopUnroll] Clamp PartialThreshold for large LoopMicroOpBufferSize (PR #67657)
via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 28 03:49:16 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-transforms
<details>
<summary>Changes</summary>
The znver3/znver4 scheduler models are outliers, specifying very large LoopMicroOpBufferSizes at 512, while typical values for other subtargets are on the order of ~50. Even if this information is micro-architecturally correct (*), this does not mean that we want to runtime unroll all loops to a size that completely fills the loop buffer. Unless this is the single hot loop in the entire application, the massive code size increase will bust the micro-op and instruction caches.
Protect against this by clamping to the default PartialThreshold of 150, which is the same as the default full-unroll threshold and half the aggressive full-unroll threshold. Allowing more partial unrolling than full unrolling is certainly nonsensical.
(*) I strongly doubt that this is actually correct -- I believe this may derive from an incorrect reading of Agner Fog's micro-architecture guide. The number 4096 that was originally used here is the size of the general micro-op cache, not that of a loop buffer. A separate loop buffer is not listed for the Zen microarchitecture. Comparing this to the listing for Skylake, it has a 1536 micro-op buffer, but only a 64 micro-op loopback buffer, with a note that it's rarely fully utilized. Our scheduling model specifies LoopMicroOpBufferSize of 50 in that case.
---
Patch is 65.57 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/67657.diff
2 Files Affected:
- (modified) llvm/include/llvm/CodeGen/BasicTTIImpl.h (+7-1)
- (modified) llvm/test/Transforms/LoopUnroll/X86/znver3.ll (+23-741)
``````````diff
diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
index c11d558a73e9d09..91daeee19acad34 100644
--- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -575,7 +575,13 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
if (PartialUnrollingThreshold.getNumOccurrences() > 0)
MaxOps = PartialUnrollingThreshold;
else if (ST->getSchedModel().LoopMicroOpBufferSize > 0)
- MaxOps = ST->getSchedModel().LoopMicroOpBufferSize;
+ // Upper bound by the default PartialThreshold, which is the same as
+ // the default full-unroll Threshold. Even if the loop micro-op buffer
+ // is very large, this does not mean that we want to unroll all loops
+ // to that length, as it would increase code size beyond the limits of
+ // what unrolling normally allows.
+ MaxOps = std::min(ST->getSchedModel().LoopMicroOpBufferSize,
+ UP.PartialThreshold);
else
return;
diff --git a/llvm/test/Transforms/LoopUnroll/X86/znver3.ll b/llvm/test/Transforms/LoopUnroll/X86/znver3.ll
index 30389062a096788..467c57906d88827 100644
--- a/llvm/test/Transforms/LoopUnroll/X86/znver3.ll
+++ b/llvm/test/Transforms/LoopUnroll/X86/znver3.ll
@@ -9,8 +9,8 @@ define i32 @test(ptr %ary) "target-cpu"="znver3" {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
-; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT_127:%.*]], [[FOR_BODY]] ]
-; CHECK-NEXT: [[SUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[SUM_NEXT_127:%.*]], [[FOR_BODY]] ]
+; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT_31:%.*]], [[FOR_BODY]] ]
+; CHECK-NEXT: [[SUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[SUM_NEXT_31:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[SUM_NEXT:%.*]] = add nsw i32 [[VAL]], [[SUM]]
@@ -137,396 +137,12 @@ define i32 @test(ptr %ary) "target-cpu"="znver3" {
; CHECK-NEXT: [[INDVARS_IV_NEXT_30:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 31
; CHECK-NEXT: [[ARRAYIDX_31:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_30]]
; CHECK-NEXT: [[VAL_31:%.*]] = load i32, ptr [[ARRAYIDX_31]], align 4
-; CHECK-NEXT: [[SUM_NEXT_31:%.*]] = add nsw i32 [[VAL_31]], [[SUM_NEXT_30]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_31:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 32
-; CHECK-NEXT: [[ARRAYIDX_32:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_31]]
-; CHECK-NEXT: [[VAL_32:%.*]] = load i32, ptr [[ARRAYIDX_32]], align 4
-; CHECK-NEXT: [[SUM_NEXT_32:%.*]] = add nsw i32 [[VAL_32]], [[SUM_NEXT_31]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_32:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 33
-; CHECK-NEXT: [[ARRAYIDX_33:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_32]]
-; CHECK-NEXT: [[VAL_33:%.*]] = load i32, ptr [[ARRAYIDX_33]], align 4
-; CHECK-NEXT: [[SUM_NEXT_33:%.*]] = add nsw i32 [[VAL_33]], [[SUM_NEXT_32]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_33:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 34
-; CHECK-NEXT: [[ARRAYIDX_34:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_33]]
-; CHECK-NEXT: [[VAL_34:%.*]] = load i32, ptr [[ARRAYIDX_34]], align 4
-; CHECK-NEXT: [[SUM_NEXT_34:%.*]] = add nsw i32 [[VAL_34]], [[SUM_NEXT_33]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_34:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 35
-; CHECK-NEXT: [[ARRAYIDX_35:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_34]]
-; CHECK-NEXT: [[VAL_35:%.*]] = load i32, ptr [[ARRAYIDX_35]], align 4
-; CHECK-NEXT: [[SUM_NEXT_35:%.*]] = add nsw i32 [[VAL_35]], [[SUM_NEXT_34]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_35:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 36
-; CHECK-NEXT: [[ARRAYIDX_36:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_35]]
-; CHECK-NEXT: [[VAL_36:%.*]] = load i32, ptr [[ARRAYIDX_36]], align 4
-; CHECK-NEXT: [[SUM_NEXT_36:%.*]] = add nsw i32 [[VAL_36]], [[SUM_NEXT_35]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_36:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 37
-; CHECK-NEXT: [[ARRAYIDX_37:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_36]]
-; CHECK-NEXT: [[VAL_37:%.*]] = load i32, ptr [[ARRAYIDX_37]], align 4
-; CHECK-NEXT: [[SUM_NEXT_37:%.*]] = add nsw i32 [[VAL_37]], [[SUM_NEXT_36]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_37:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 38
-; CHECK-NEXT: [[ARRAYIDX_38:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_37]]
-; CHECK-NEXT: [[VAL_38:%.*]] = load i32, ptr [[ARRAYIDX_38]], align 4
-; CHECK-NEXT: [[SUM_NEXT_38:%.*]] = add nsw i32 [[VAL_38]], [[SUM_NEXT_37]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_38:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 39
-; CHECK-NEXT: [[ARRAYIDX_39:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_38]]
-; CHECK-NEXT: [[VAL_39:%.*]] = load i32, ptr [[ARRAYIDX_39]], align 4
-; CHECK-NEXT: [[SUM_NEXT_39:%.*]] = add nsw i32 [[VAL_39]], [[SUM_NEXT_38]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_39:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 40
-; CHECK-NEXT: [[ARRAYIDX_40:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_39]]
-; CHECK-NEXT: [[VAL_40:%.*]] = load i32, ptr [[ARRAYIDX_40]], align 4
-; CHECK-NEXT: [[SUM_NEXT_40:%.*]] = add nsw i32 [[VAL_40]], [[SUM_NEXT_39]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_40:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 41
-; CHECK-NEXT: [[ARRAYIDX_41:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_40]]
-; CHECK-NEXT: [[VAL_41:%.*]] = load i32, ptr [[ARRAYIDX_41]], align 4
-; CHECK-NEXT: [[SUM_NEXT_41:%.*]] = add nsw i32 [[VAL_41]], [[SUM_NEXT_40]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_41:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 42
-; CHECK-NEXT: [[ARRAYIDX_42:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_41]]
-; CHECK-NEXT: [[VAL_42:%.*]] = load i32, ptr [[ARRAYIDX_42]], align 4
-; CHECK-NEXT: [[SUM_NEXT_42:%.*]] = add nsw i32 [[VAL_42]], [[SUM_NEXT_41]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_42:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 43
-; CHECK-NEXT: [[ARRAYIDX_43:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_42]]
-; CHECK-NEXT: [[VAL_43:%.*]] = load i32, ptr [[ARRAYIDX_43]], align 4
-; CHECK-NEXT: [[SUM_NEXT_43:%.*]] = add nsw i32 [[VAL_43]], [[SUM_NEXT_42]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_43:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 44
-; CHECK-NEXT: [[ARRAYIDX_44:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_43]]
-; CHECK-NEXT: [[VAL_44:%.*]] = load i32, ptr [[ARRAYIDX_44]], align 4
-; CHECK-NEXT: [[SUM_NEXT_44:%.*]] = add nsw i32 [[VAL_44]], [[SUM_NEXT_43]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_44:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 45
-; CHECK-NEXT: [[ARRAYIDX_45:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_44]]
-; CHECK-NEXT: [[VAL_45:%.*]] = load i32, ptr [[ARRAYIDX_45]], align 4
-; CHECK-NEXT: [[SUM_NEXT_45:%.*]] = add nsw i32 [[VAL_45]], [[SUM_NEXT_44]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_45:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 46
-; CHECK-NEXT: [[ARRAYIDX_46:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_45]]
-; CHECK-NEXT: [[VAL_46:%.*]] = load i32, ptr [[ARRAYIDX_46]], align 4
-; CHECK-NEXT: [[SUM_NEXT_46:%.*]] = add nsw i32 [[VAL_46]], [[SUM_NEXT_45]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_46:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 47
-; CHECK-NEXT: [[ARRAYIDX_47:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_46]]
-; CHECK-NEXT: [[VAL_47:%.*]] = load i32, ptr [[ARRAYIDX_47]], align 4
-; CHECK-NEXT: [[SUM_NEXT_47:%.*]] = add nsw i32 [[VAL_47]], [[SUM_NEXT_46]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_47:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 48
-; CHECK-NEXT: [[ARRAYIDX_48:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_47]]
-; CHECK-NEXT: [[VAL_48:%.*]] = load i32, ptr [[ARRAYIDX_48]], align 4
-; CHECK-NEXT: [[SUM_NEXT_48:%.*]] = add nsw i32 [[VAL_48]], [[SUM_NEXT_47]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_48:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 49
-; CHECK-NEXT: [[ARRAYIDX_49:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_48]]
-; CHECK-NEXT: [[VAL_49:%.*]] = load i32, ptr [[ARRAYIDX_49]], align 4
-; CHECK-NEXT: [[SUM_NEXT_49:%.*]] = add nsw i32 [[VAL_49]], [[SUM_NEXT_48]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_49:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 50
-; CHECK-NEXT: [[ARRAYIDX_50:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_49]]
-; CHECK-NEXT: [[VAL_50:%.*]] = load i32, ptr [[ARRAYIDX_50]], align 4
-; CHECK-NEXT: [[SUM_NEXT_50:%.*]] = add nsw i32 [[VAL_50]], [[SUM_NEXT_49]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_50:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 51
-; CHECK-NEXT: [[ARRAYIDX_51:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_50]]
-; CHECK-NEXT: [[VAL_51:%.*]] = load i32, ptr [[ARRAYIDX_51]], align 4
-; CHECK-NEXT: [[SUM_NEXT_51:%.*]] = add nsw i32 [[VAL_51]], [[SUM_NEXT_50]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_51:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 52
-; CHECK-NEXT: [[ARRAYIDX_52:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_51]]
-; CHECK-NEXT: [[VAL_52:%.*]] = load i32, ptr [[ARRAYIDX_52]], align 4
-; CHECK-NEXT: [[SUM_NEXT_52:%.*]] = add nsw i32 [[VAL_52]], [[SUM_NEXT_51]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_52:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 53
-; CHECK-NEXT: [[ARRAYIDX_53:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_52]]
-; CHECK-NEXT: [[VAL_53:%.*]] = load i32, ptr [[ARRAYIDX_53]], align 4
-; CHECK-NEXT: [[SUM_NEXT_53:%.*]] = add nsw i32 [[VAL_53]], [[SUM_NEXT_52]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_53:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 54
-; CHECK-NEXT: [[ARRAYIDX_54:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_53]]
-; CHECK-NEXT: [[VAL_54:%.*]] = load i32, ptr [[ARRAYIDX_54]], align 4
-; CHECK-NEXT: [[SUM_NEXT_54:%.*]] = add nsw i32 [[VAL_54]], [[SUM_NEXT_53]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_54:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 55
-; CHECK-NEXT: [[ARRAYIDX_55:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_54]]
-; CHECK-NEXT: [[VAL_55:%.*]] = load i32, ptr [[ARRAYIDX_55]], align 4
-; CHECK-NEXT: [[SUM_NEXT_55:%.*]] = add nsw i32 [[VAL_55]], [[SUM_NEXT_54]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_55:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 56
-; CHECK-NEXT: [[ARRAYIDX_56:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_55]]
-; CHECK-NEXT: [[VAL_56:%.*]] = load i32, ptr [[ARRAYIDX_56]], align 4
-; CHECK-NEXT: [[SUM_NEXT_56:%.*]] = add nsw i32 [[VAL_56]], [[SUM_NEXT_55]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_56:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 57
-; CHECK-NEXT: [[ARRAYIDX_57:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_56]]
-; CHECK-NEXT: [[VAL_57:%.*]] = load i32, ptr [[ARRAYIDX_57]], align 4
-; CHECK-NEXT: [[SUM_NEXT_57:%.*]] = add nsw i32 [[VAL_57]], [[SUM_NEXT_56]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_57:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 58
-; CHECK-NEXT: [[ARRAYIDX_58:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_57]]
-; CHECK-NEXT: [[VAL_58:%.*]] = load i32, ptr [[ARRAYIDX_58]], align 4
-; CHECK-NEXT: [[SUM_NEXT_58:%.*]] = add nsw i32 [[VAL_58]], [[SUM_NEXT_57]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_58:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 59
-; CHECK-NEXT: [[ARRAYIDX_59:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_58]]
-; CHECK-NEXT: [[VAL_59:%.*]] = load i32, ptr [[ARRAYIDX_59]], align 4
-; CHECK-NEXT: [[SUM_NEXT_59:%.*]] = add nsw i32 [[VAL_59]], [[SUM_NEXT_58]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_59:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 60
-; CHECK-NEXT: [[ARRAYIDX_60:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_59]]
-; CHECK-NEXT: [[VAL_60:%.*]] = load i32, ptr [[ARRAYIDX_60]], align 4
-; CHECK-NEXT: [[SUM_NEXT_60:%.*]] = add nsw i32 [[VAL_60]], [[SUM_NEXT_59]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_60:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 61
-; CHECK-NEXT: [[ARRAYIDX_61:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_60]]
-; CHECK-NEXT: [[VAL_61:%.*]] = load i32, ptr [[ARRAYIDX_61]], align 4
-; CHECK-NEXT: [[SUM_NEXT_61:%.*]] = add nsw i32 [[VAL_61]], [[SUM_NEXT_60]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_61:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 62
-; CHECK-NEXT: [[ARRAYIDX_62:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_61]]
-; CHECK-NEXT: [[VAL_62:%.*]] = load i32, ptr [[ARRAYIDX_62]], align 4
-; CHECK-NEXT: [[SUM_NEXT_62:%.*]] = add nsw i32 [[VAL_62]], [[SUM_NEXT_61]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_62:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 63
-; CHECK-NEXT: [[ARRAYIDX_63:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_62]]
-; CHECK-NEXT: [[VAL_63:%.*]] = load i32, ptr [[ARRAYIDX_63]], align 4
-; CHECK-NEXT: [[SUM_NEXT_63:%.*]] = add nsw i32 [[VAL_63]], [[SUM_NEXT_62]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_63:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 64
-; CHECK-NEXT: [[ARRAYIDX_64:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_63]]
-; CHECK-NEXT: [[VAL_64:%.*]] = load i32, ptr [[ARRAYIDX_64]], align 4
-; CHECK-NEXT: [[SUM_NEXT_64:%.*]] = add nsw i32 [[VAL_64]], [[SUM_NEXT_63]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_64:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 65
-; CHECK-NEXT: [[ARRAYIDX_65:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_64]]
-; CHECK-NEXT: [[VAL_65:%.*]] = load i32, ptr [[ARRAYIDX_65]], align 4
-; CHECK-NEXT: [[SUM_NEXT_65:%.*]] = add nsw i32 [[VAL_65]], [[SUM_NEXT_64]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_65:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 66
-; CHECK-NEXT: [[ARRAYIDX_66:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_65]]
-; CHECK-NEXT: [[VAL_66:%.*]] = load i32, ptr [[ARRAYIDX_66]], align 4
-; CHECK-NEXT: [[SUM_NEXT_66:%.*]] = add nsw i32 [[VAL_66]], [[SUM_NEXT_65]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_66:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 67
-; CHECK-NEXT: [[ARRAYIDX_67:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_66]]
-; CHECK-NEXT: [[VAL_67:%.*]] = load i32, ptr [[ARRAYIDX_67]], align 4
-; CHECK-NEXT: [[SUM_NEXT_67:%.*]] = add nsw i32 [[VAL_67]], [[SUM_NEXT_66]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_67:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 68
-; CHECK-NEXT: [[ARRAYIDX_68:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_67]]
-; CHECK-NEXT: [[VAL_68:%.*]] = load i32, ptr [[ARRAYIDX_68]], align 4
-; CHECK-NEXT: [[SUM_NEXT_68:%.*]] = add nsw i32 [[VAL_68]], [[SUM_NEXT_67]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_68:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 69
-; CHECK-NEXT: [[ARRAYIDX_69:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_68]]
-; CHECK-NEXT: [[VAL_69:%.*]] = load i32, ptr [[ARRAYIDX_69]], align 4
-; CHECK-NEXT: [[SUM_NEXT_69:%.*]] = add nsw i32 [[VAL_69]], [[SUM_NEXT_68]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_69:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 70
-; CHECK-NEXT: [[ARRAYIDX_70:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_69]]
-; CHECK-NEXT: [[VAL_70:%.*]] = load i32, ptr [[ARRAYIDX_70]], align 4
-; CHECK-NEXT: [[SUM_NEXT_70:%.*]] = add nsw i32 [[VAL_70]], [[SUM_NEXT_69]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_70:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 71
-; CHECK-NEXT: [[ARRAYIDX_71:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_70]]
-; CHECK-NEXT: [[VAL_71:%.*]] = load i32, ptr [[ARRAYIDX_71]], align 4
-; CHECK-NEXT: [[SUM_NEXT_71:%.*]] = add nsw i32 [[VAL_71]], [[SUM_NEXT_70]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_71:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 72
-; CHECK-NEXT: [[ARRAYIDX_72:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_71]]
-; CHECK-NEXT: [[VAL_72:%.*]] = load i32, ptr [[ARRAYIDX_72]], align 4
-; CHECK-NEXT: [[SUM_NEXT_72:%.*]] = add nsw i32 [[VAL_72]], [[SUM_NEXT_71]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_72:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 73
-; CHECK-NEXT: [[ARRAYIDX_73:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_72]]
-; CHECK-NEXT: [[VAL_73:%.*]] = load i32, ptr [[ARRAYIDX_73]], align 4
-; CHECK-NEXT: [[SUM_NEXT_73:%.*]] = add nsw i32 [[VAL_73]], [[SUM_NEXT_72]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_73:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 74
-; CHECK-NEXT: [[ARRAYIDX_74:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_73]]
-; CHECK-NEXT: [[VAL_74:%.*]] = load i32, ptr [[ARRAYIDX_74]], align 4
-; CHECK-NEXT: [[SUM_NEXT_74:%.*]] = add nsw i32 [[VAL_74]], [[SUM_NEXT_73]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_74:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 75
-; CHECK-NEXT: [[ARRAYIDX_75:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_74]]
-; CHECK-NEXT: [[VAL_75:%.*]] = load i32, ptr [[ARRAYIDX_75]], align 4
-; CHECK-NEXT: [[SUM_NEXT_75:%.*]] = add nsw i32 [[VAL_75]], [[SUM_NEXT_74]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_75:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 76
-; CHECK-NEXT: [[ARRAYIDX_76:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_75]]
-; CHECK-NEXT: [[VAL_76:%.*]] = load i32, ptr [[ARRAYIDX_76]], align 4
-; CHECK-NEXT: [[SUM_NEXT_76:%.*]] = add nsw i32 [[VAL_76]], [[SUM_NEXT_75]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_76:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 77
-; CHECK-NEXT: [[ARRAYIDX_77:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_76]]
-; CHECK-NEXT: [[VAL_77:%.*]] = load i32, ptr [[ARRAYIDX_77]], align 4
-; CHECK-NEXT: [[SUM_NEXT_77:%.*]] = add nsw i32 [[VAL_77]], [[SUM_NEXT_76]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_77:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 78
-; CHECK-NEXT: [[ARRAYIDX_78:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_77]]
-; CHECK-NEXT: [[VAL_78:%.*]] = load i32, ptr [[ARRAYIDX_78]], align 4
-; CHECK-NEXT: [[SUM_NEXT_78:%.*]] = add nsw i32 [[VAL_78]], [[SUM_NEXT_77]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_78:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 79
-; CHECK-NEXT: [[ARRAYIDX_79:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_78]]
-; CHECK-NEXT: [[VAL_79:%.*]] = load i32, ptr [[ARRAYIDX_79]], align 4
-; CHECK-NEXT: [[SUM_NEXT_79:%.*]] = add nsw i32 [[VAL_79]], [[SUM_NEXT_78]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_79:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 80
-; CHECK-NEXT: [[ARRAYIDX_80:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_79]]
-; CHECK-NEXT: [[VAL_80:%.*]] = load i32, ptr [[ARRAYIDX_80]], align 4
-; CHECK-NEXT: [[SUM_NEXT_80:%.*]] = add nsw i32 [[VAL_80]], [[SUM_NEXT_79]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_80:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 81
-; CHECK-NEXT: [[ARRAYIDX_81:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_80]]
-; CHECK-NEXT: [[VAL_81:%.*]] = load i32, ptr [[ARRAYIDX_81]], align 4
-; CHECK-NEXT: [[SUM_NEXT_81:%.*]] = add nsw i32 [[VAL_81]], [[SUM_NEXT_80]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_81:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 82
-; CHECK-NEXT: [[ARRAYIDX_82:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_81]]
-; CHECK-NEXT: [[VAL_82:%.*]] = load i32, ptr [[ARRAYIDX_82]], align 4
-; CHECK-NEXT: [[SUM_NEXT_82:%.*]] = add nsw i32 [[VAL_82]], [[SUM_NEXT_81]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_82:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 83
-; CHECK-NEXT: [[ARRAYIDX_83:%.*]] = getelementptr inbounds i32, ptr [[ARY]], i64 [[INDVARS_IV_NEXT_82]]
-; CHECK-NEXT: [[VAL_83:%.*]] = load i32, ptr [[ARRAYIDX_83]], align 4
-; CHECK-NEXT: [[SUM_NEXT_83:%.*]] = add nsw i32 [[VAL_83]], [[SUM_NEXT_82]]
-; CHECK-NEXT: [[INDVARS_IV_NEXT_83:%.*]] = add nuw nsw i6...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/67657
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