ce3be45cac
r44412 fixed a huge compile time regression but it needed ModifiedDT flag to be maintained correctly in optimizations in optimizeBlock() and optimizeInst(). Function optimizeSelectInst() does not update the flag. This patch propagates the flag in optimizeSelectInst() back to optimizeBlock(). This patch also removes ModifiedDT in CodeGenPrepare class (which is not used). The property of ModifiedDT is now recorded in a ref parameter. Differential Revision: https://reviews.llvm.org/D59139 llvm-svn: 355751
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -codegenprepare < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i1 @PR41004(i32 %x, i32 %y, i32 %t1) {
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; CHECK-LABEL: @PR41004(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T0:%.*]] = icmp eq i32 [[Y:%.*]], 1
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; CHECK-NEXT: br i1 [[T0]], label [[SELECT_TRUE_SINK:%.*]], label [[SELECT_END:%.*]]
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; CHECK: select.true.sink:
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; CHECK-NEXT: [[REM:%.*]] = srem i32 [[X:%.*]], 2
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; CHECK-NEXT: br label [[SELECT_END]]
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; CHECK: select.end:
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; CHECK-NEXT: [[MUL:%.*]] = phi i32 [ [[REM]], [[SELECT_TRUE_SINK]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 [[T1:%.*]], i32 1)
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; CHECK-NEXT: [[MATH:%.*]] = extractvalue { i32, i1 } [[TMP0]], 0
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; CHECK-NEXT: [[OV:%.*]] = extractvalue { i32, i1 } [[TMP0]], 1
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; CHECK-NEXT: [[ADD:%.*]] = add i32 [[MATH]], [[MUL]]
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; CHECK-NEXT: ret i1 [[OV]]
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;
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entry:
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%rem = srem i32 %x, 2
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%t0 = icmp eq i32 %y, 1
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%mul = select i1 %t0, i32 %rem, i32 0
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%neg = add i32 %t1, -1
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%add = add i32 %neg, %mul
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br label %if
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if:
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%tobool = icmp eq i32 %t1, 0
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ret i1 %tobool
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}
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