1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -O1 -S < %s | FileCheck %s
3 ; RUN: opt -passes='default<O1>' -S < %s | FileCheck %s
5 ; Don't simplify unconditional branches from empty blocks in simplifyCFG
6 ; until late in the pipeline because it can destroy canonical loop structure.
8 define i1 @PR33605(i32 %a, i32 %b, i32* %c) {
9 ; CHECK-LABEL: @PR33605(
11 ; CHECK-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]]
12 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 1
13 ; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
14 ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[OR]], [[TMP0]]
15 ; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
17 ; CHECK-NEXT: store i32 [[OR]], i32* [[ARRAYIDX]], align 4
18 ; CHECK-NEXT: call void @foo()
19 ; CHECK-NEXT: br label [[IF_END]]
21 ; CHECK-NEXT: [[TMP1:%.*]] = xor i1 [[CMP]], true
22 ; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[C]], align 4
23 ; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[OR]], [[TMP2]]
24 ; CHECK-NEXT: br i1 [[CMP_1]], label [[IF_END_1:%.*]], label [[IF_THEN_1:%.*]]
26 ; CHECK-NEXT: store i32 [[OR]], i32* [[C]], align 4
27 ; CHECK-NEXT: call void @foo()
28 ; CHECK-NEXT: br label [[IF_END_1]]
30 ; CHECK-NEXT: [[CHANGED_1_OFF0_1:%.*]] = phi i1 [ true, [[IF_THEN_1]] ], [ [[TMP1]], [[IF_END]] ]
31 ; CHECK-NEXT: ret i1 [[CHANGED_1_OFF0_1]]
37 %i.0 = phi i32 [ 2, %entry ], [ %dec, %if.end ]
38 %changed.0.off0 = phi i1 [ false, %entry ], [ %changed.1.off0, %if.end ]
39 %dec = add nsw i32 %i.0, -1
40 %tobool = icmp eq i32 %i.0, 0
41 br i1 %tobool, label %for.cond.cleanup, label %for.body
44 %changed.0.off0.lcssa = phi i1 [ %changed.0.off0, %for.cond ]
45 ret i1 %changed.0.off0.lcssa
49 %idxprom = sext i32 %dec to i64
50 %arrayidx = getelementptr inbounds i32, i32* %c, i64 %idxprom
51 %0 = load i32, i32* %arrayidx, align 4
52 %cmp = icmp eq i32 %or, %0
53 br i1 %cmp, label %if.end, label %if.then
56 store i32 %or, i32* %arrayidx, align 4
61 %changed.1.off0 = phi i1 [ true, %if.then ], [ %changed.0.off0, %for.body ]
67 ; PR34603 - https://bugs.llvm.org/show_bug.cgi?id=34603
68 ; We should have a select of doubles, not a select of double pointers.
69 ; SimplifyCFG should not flatten this before early-cse has a chance to eliminate redundant ops.
71 define double @max_of_loads(double* %x, double* %y, i64 %i) {
72 ; CHECK-LABEL: @max_of_loads(
74 ; CHECK-NEXT: [[XI_PTR:%.*]] = getelementptr double, double* [[X:%.*]], i64 [[I:%.*]]
75 ; CHECK-NEXT: [[YI_PTR:%.*]] = getelementptr double, double* [[Y:%.*]], i64 [[I]]
76 ; CHECK-NEXT: [[XI:%.*]] = load double, double* [[XI_PTR]], align 8
77 ; CHECK-NEXT: [[YI:%.*]] = load double, double* [[YI_PTR]], align 8
78 ; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[XI]], [[YI]]
79 ; CHECK-NEXT: [[XI_YI:%.*]] = select i1 [[CMP]], double [[XI]], double [[YI]]
80 ; CHECK-NEXT: ret double [[XI_YI]]
83 %xi_ptr = getelementptr double, double* %x, i64 %i
84 %yi_ptr = getelementptr double, double* %y, i64 %i
85 %xi = load double, double* %xi_ptr
86 %yi = load double, double* %yi_ptr
87 %cmp = fcmp ogt double %xi, %yi
88 br i1 %cmp, label %if, label %else
91 %xi_ptr_again = getelementptr double, double* %x, i64 %i
92 %xi_again = load double, double* %xi_ptr_again
96 %yi_ptr_again = getelementptr double, double* %y, i64 %i
97 %yi_again = load double, double* %yi_ptr_again
101 %max = phi double [ %xi_again, %if ], [ %yi_again, %else ]