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llvm-project/llvm/test/Transforms/IndVarSimplify/replace-loop-exit-folds.ll
David Green 3bcb0aa7f9 [SCEV] Add some extra tests for IndVarSimplifys loop exit values. NFC. 
Add some tests for various loops of the form:
  while(S >= 32) {
    S -= 32;
    something();
  };
  return S;

llvm-svn: 355389
2019-03-05 11:18:55 +00:00

233 lines
9.1 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -indvars -S < %s | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
define i32 @remove_loop(i32 %size) {
; CHECK-LABEL: @remove_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 -1, [[SIZE:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[TMP0]], -32
; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -32
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[SIZE]], [[UMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[TMP2]], 32
; CHECK-NEXT: [[TMP4:%.*]] = lshr i32 [[TMP3]], 5
; CHECK-NEXT: [[TMP5:%.*]] = shl i32 [[TMP4]], 5
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[SIZE_ADDR_0:%.*]] = phi i32 [ [[SIZE]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_COND]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SIZE_ADDR_0]], 31
; CHECK-NEXT: [[SUB]] = add i32 [[SIZE_ADDR_0]], -32
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_COND]], label [[WHILE_END:%.*]]
; CHECK: while.end:
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[SIZE]], [[TMP5]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %while.cond
while.cond: ; preds = %while.cond, %entry
%size.addr.0 = phi i32 [ %size, %entry ], [ %sub, %while.cond ]
%cmp = icmp ugt i32 %size.addr.0, 31
%sub = add i32 %size.addr.0, -32
br i1 %cmp, label %while.cond, label %while.end
while.end: ; preds = %while.cond
%size.lcssa = phi i32 [ %size.addr.0, %while.cond ]
ret i32 %size.lcssa
}
define i32 @used_loop(i32 %size) minsize {
; CHECK-LABEL: @used_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 -1, [[SIZE:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[TMP0]], -32
; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -32
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[SIZE]], [[UMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[TMP2]], 32
; CHECK-NEXT: [[TMP4:%.*]] = lshr i32 [[TMP3]], 5
; CHECK-NEXT: [[TMP5:%.*]] = shl i32 [[TMP4]], 5
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[SIZE_ADDR_0:%.*]] = phi i32 [ [[SIZE]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_COND]] ]
; CHECK-NEXT: tail call void @call()
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SIZE_ADDR_0]], 31
; CHECK-NEXT: [[SUB]] = add i32 [[SIZE_ADDR_0]], -32
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_COND]], label [[WHILE_END:%.*]]
; CHECK: while.end:
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[SIZE]], [[TMP5]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %while.cond
while.cond: ; preds = %while.cond, %entry
%size.addr.0 = phi i32 [ %size, %entry ], [ %sub, %while.cond ]
tail call void @call()
%cmp = icmp ugt i32 %size.addr.0, 31
%sub = add i32 %size.addr.0, -32
br i1 %cmp, label %while.cond, label %while.end
while.end: ; preds = %while.cond
%size.lcssa = phi i32 [ %size.addr.0, %while.cond ]
ret i32 %size.lcssa
}
define i32 @test_signed_while(i32 %S) {
; CHECK-LABEL: @test_signed_while(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 -1, [[S:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[TMP0]], -32
; CHECK-NEXT: [[SMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -32
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[S]], [[SMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[TMP2]], 32
; CHECK-NEXT: [[TMP4:%.*]] = lshr i32 [[TMP3]], 5
; CHECK-NEXT: [[TMP5:%.*]] = shl i32 [[TMP4]], 5
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[S_ADDR_0]], 31
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY]], label [[WHILE_END:%.*]]
; CHECK: while.body:
; CHECK-NEXT: [[SUB]] = add nsw i32 [[S_ADDR_0]], -32
; CHECK-NEXT: tail call void @call()
; CHECK-NEXT: br label [[WHILE_COND]]
; CHECK: while.end:
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[S]], [[TMP5]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %while.cond
while.cond: ; preds = %while.body, %entry
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %while.body ]
%cmp = icmp sgt i32 %S.addr.0, 31
br i1 %cmp, label %while.body, label %while.end
while.body: ; preds = %while.cond
%sub = add nsw i32 %S.addr.0, -32
tail call void @call()
br label %while.cond
while.end: ; preds = %while.cond
%S.addr.0.lcssa = phi i32 [ %S.addr.0, %while.cond ]
ret i32 %S.addr.0.lcssa
}
define i32 @test_signed_do(i32 %S) {
; CHECK-LABEL: @test_signed_do(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 15, [[S:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[TMP0]], -16
; CHECK-NEXT: [[SMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -16
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[S]], [[SMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = lshr i32 [[TMP2]], 4
; CHECK-NEXT: [[TMP4:%.*]] = shl i32 [[TMP3]], 4
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[DO_BODY]] ]
; CHECK-NEXT: [[SUB]] = add nsw i32 [[S_ADDR_0]], -16
; CHECK-NEXT: tail call void @call()
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[SUB]], 15
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
; CHECK: do.end:
; CHECK-NEXT: [[TMP5:%.*]] = add i32 [[S]], -16
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[TMP5]], [[TMP4]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %do.body
do.body: ; preds = %do.body, %entry
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %do.body ]
%sub = add nsw i32 %S.addr.0, -16
tail call void @call()
%cmp = icmp sgt i32 %sub, 15
br i1 %cmp, label %do.body, label %do.end
do.end: ; preds = %do.body
%sub.lcssa = phi i32 [ %sub, %do.body ]
ret i32 %sub.lcssa
}
define i32 @test_unsigned_while(i32 %S) {
; CHECK-LABEL: @test_unsigned_while(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 -1, [[S:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[TMP0]], -16
; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -16
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[S]], [[UMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[TMP2]], 16
; CHECK-NEXT: [[TMP4:%.*]] = lshr i32 [[TMP3]], 4
; CHECK-NEXT: [[TMP5:%.*]] = shl i32 [[TMP4]], 4
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[S_ADDR_0]], 15
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY]], label [[WHILE_END:%.*]]
; CHECK: while.body:
; CHECK-NEXT: [[SUB]] = add i32 [[S_ADDR_0]], -16
; CHECK-NEXT: tail call void @call()
; CHECK-NEXT: br label [[WHILE_COND]]
; CHECK: while.end:
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[S]], [[TMP5]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %while.cond
while.cond: ; preds = %while.body, %entry
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %while.body ]
%cmp = icmp ugt i32 %S.addr.0, 15
br i1 %cmp, label %while.body, label %while.end
while.body: ; preds = %while.cond
%sub = add i32 %S.addr.0, -16
tail call void @call()
br label %while.cond
while.end: ; preds = %while.cond
%S.addr.0.lcssa = phi i32 [ %S.addr.0, %while.cond ]
ret i32 %S.addr.0.lcssa
}
define i32 @test_unsigned_do(i32 %S) {
; CHECK-LABEL: @test_unsigned_do(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 15, [[S:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[TMP0]], -16
; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 -16
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[S]], [[UMAX]]
; CHECK-NEXT: [[TMP3:%.*]] = lshr i32 [[TMP2]], 4
; CHECK-NEXT: [[TMP4:%.*]] = shl i32 [[TMP3]], 4
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[DO_BODY]] ]
; CHECK-NEXT: [[SUB]] = add i32 [[S_ADDR_0]], -16
; CHECK-NEXT: tail call void @call()
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SUB]], 15
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
; CHECK: do.end:
; CHECK-NEXT: [[TMP5:%.*]] = add i32 [[S]], -16
; CHECK-NEXT: [[TMP6:%.*]] = sub i32 [[TMP5]], [[TMP4]]
; CHECK-NEXT: ret i32 [[TMP6]]
;
entry:
br label %do.body
do.body: ; preds = %do.body, %entry
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %do.body ]
%sub = add i32 %S.addr.0, -16
tail call void @call()
%cmp = icmp ugt i32 %sub, 15
br i1 %cmp, label %do.body, label %do.end
do.end: ; preds = %do.body
%sub.lcssa = phi i32 [ %sub, %do.body ]
ret i32 %sub.lcssa
}
declare void @call()
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