derek.holloway
7502bf64a4
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55 lines
2.3 KiB
LLVM
55 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -passes=gvn -S | FileCheck %s
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; Should delete the second call to strlen even though the intervening strchr call exists.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin7"
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define ptr @test(ptr %P, ptr %Q, i32 %x, i32 %y) nounwind readonly {
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; CHECK-LABEL: define ptr @test(
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; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @strlen(ptr [[P]]), !prof [[PROF0:![0-9]+]]
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[TMP1]], label %[[BB:.*]], label %[[BB1:.*]]
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; CHECK: [[BB]]:
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; CHECK-NEXT: [[TMP2:%.*]] = sdiv i32 [[X]], [[Y]]
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; CHECK-NEXT: br label %[[BB1]]
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; CHECK: [[BB1]]:
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; CHECK-NEXT: [[X_ADDR_0:%.*]] = phi i32 [ [[TMP2]], %[[BB]] ], [ [[X]], %[[ENTRY]] ]
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; CHECK-NEXT: [[TMP3:%.*]] = tail call ptr @strchr(ptr [[Q]], i32 97)
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; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[X_ADDR_0]], [[TMP0]]
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; CHECK-NEXT: [[TMP5:%.*]] = getelementptr i8, ptr [[TMP3]], i32 [[X_ADDR_0]]
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; CHECK-NEXT: ret ptr [[TMP5]]
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;
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entry:
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%0 = tail call i32 @strlen(ptr %P), !prof !0 ; <i32> [#uses=2]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %bb, label %bb1
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bb: ; preds = %entry
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%2 = sdiv i32 %x, %y ; <i32> [#uses=1]
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br label %bb1
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bb1: ; preds = %bb, %entry
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%x_addr.0 = phi i32 [ %2, %bb ], [ %x, %entry ] ; <i32> [#uses=1]
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%3 = tail call ptr @strchr(ptr %Q, i32 97) ; <ptr> [#uses=1]
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%4 = tail call i32 @strlen(ptr %P) , !prof !1 ; <i32> [#uses=1]
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%5 = add i32 %x_addr.0, %0 ; <i32> [#uses=1]
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%.sum = sub i32 %5, %4 ; <i32> [#uses=1]
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%6 = getelementptr i8, ptr %3, i32 %.sum ; <ptr> [#uses=1]
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ret ptr %6
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}
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declare i32 @strlen(ptr) nounwind readonly
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declare ptr @strchr(ptr, i32) nounwind readonly
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!0 = !{!"branch_weights", i32 95}
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!1 = !{!"branch_weights", i32 95}
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;.
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; CHECK: [[PROF0]] = !{!"branch_weights", i64 190}
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;.
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