4def99e642
There is still some such patterns that require collaboration of folds to handle,that we don't currently do.
125 lines
4.2 KiB
LLVM
125 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -O1 -S < %s | FileCheck %s
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; RUN: opt -passes='default<O1>' -S < %s | FileCheck %s
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; Don't simplify unconditional branches from empty blocks in simplifyCFG
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; until late in the pipeline because it can destroy canonical loop structure.
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define i1 @PR33605(i32 %a, i32 %b, ptr %c) {
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; CHECK-LABEL: @PR33605(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 1
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[OR]], [[TMP0]]
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: store i32 [[OR]], ptr [[ARRAYIDX]], align 4
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; CHECK-NEXT: tail call void @foo()
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[C]], align 4
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; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[OR]], [[TMP1]]
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; CHECK-NEXT: br i1 [[CMP_1]], label [[IF_END_1:%.*]], label [[IF_THEN_1:%.*]]
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; CHECK: if.then.1:
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; CHECK-NEXT: store i32 [[OR]], ptr [[C]], align 4
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; CHECK-NEXT: tail call void @foo()
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; CHECK-NEXT: br label [[IF_END_1]]
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; CHECK: if.end.1:
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; CHECK-NEXT: [[CHANGED_1_OFF0_1:%.*]] = phi i1 [ true, [[IF_THEN_1]] ], [ [[CMP]], [[IF_END]] ]
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; CHECK-NEXT: ret i1 [[CHANGED_1_OFF0_1]]
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;
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entry:
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br label %for.cond
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for.cond:
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%i.0 = phi i32 [ 2, %entry ], [ %dec, %if.end ]
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%changed.0.off0 = phi i1 [ false, %entry ], [ %changed.1.off0, %if.end ]
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%dec = add nsw i32 %i.0, -1
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%tobool = icmp eq i32 %i.0, 0
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br i1 %tobool, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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%changed.0.off0.lcssa = phi i1 [ %changed.0.off0, %for.cond ]
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ret i1 %changed.0.off0.lcssa
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for.body:
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%or = or i32 %a, %b
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%idxprom = sext i32 %dec to i64
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%arrayidx = getelementptr inbounds i32, ptr %c, i64 %idxprom
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%0 = load i32, ptr %arrayidx, align 4
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%cmp = icmp eq i32 %or, %0
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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store i32 %or, ptr %arrayidx, align 4
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call void @foo()
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br label %if.end
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if.end:
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%changed.1.off0 = phi i1 [ true, %if.then ], [ %changed.0.off0, %for.body ]
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br label %for.cond
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}
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declare void @foo()
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; PR34603 - https://bugs.llvm.org/show_bug.cgi?id=34603
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; We should have a select of doubles, not a select of double pointers.
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; SimplifyCFG should not flatten this before early-cse has a chance to eliminate redundant ops.
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define double @max_of_loads(ptr %x, ptr %y, i64 %i) {
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; CHECK-LABEL: @max_of_loads(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[XI_PTR:%.*]] = getelementptr double, ptr [[X:%.*]], i64 [[I:%.*]]
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; CHECK-NEXT: [[YI_PTR:%.*]] = getelementptr double, ptr [[Y:%.*]], i64 [[I]]
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; CHECK-NEXT: [[XI:%.*]] = load double, ptr [[XI_PTR]], align 8
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; CHECK-NEXT: [[YI:%.*]] = load double, ptr [[YI_PTR]], align 8
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; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[XI]], [[YI]]
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; CHECK-NEXT: [[XI_YI:%.*]] = select i1 [[CMP]], double [[XI]], double [[YI]]
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; CHECK-NEXT: ret double [[XI_YI]]
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;
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entry:
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%xi_ptr = getelementptr double, ptr %x, i64 %i
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%yi_ptr = getelementptr double, ptr %y, i64 %i
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%xi = load double, ptr %xi_ptr
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%yi = load double, ptr %yi_ptr
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%cmp = fcmp ogt double %xi, %yi
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br i1 %cmp, label %if, label %else
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if:
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%xi_ptr_again = getelementptr double, ptr %x, i64 %i
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%xi_again = load double, ptr %xi_ptr_again
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br label %end
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else:
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%yi_ptr_again = getelementptr double, ptr %y, i64 %i
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%yi_again = load double, ptr %yi_ptr_again
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br label %end
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end:
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%max = phi double [ %xi_again, %if ], [ %yi_again, %else ]
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ret double %max
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}
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define i1 @PR58313(i1 %lhs, i1 %rhs) {
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; CHECK-LABEL: @PR58313(
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; CHECK-NEXT: andandend:
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = xor i1 [[LHS:%.*]], [[RHS:%.*]]
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; CHECK-NEXT: ret i1 [[SPEC_SELECT]]
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;
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andandend:
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%0 = xor i1 %rhs, true
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%andandval = select i1 %lhs, i1 %0, i1 false
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br i1 %andandval, label %ororend, label %oror
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oror:
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%1 = xor i1 %lhs, true
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%andandval3 = select i1 %1, i1 %rhs, i1 false
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br label %ororend
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ororend:
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%ororval = phi i1 [ true, %andandend ], [ %andandval3, %oror ]
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ret i1 %ororval
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}
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