forked from OSchip/llvm-project
100 lines
2.9 KiB
LLVM
100 lines
2.9 KiB
LLVM
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; RUN: opt < %s -loop-reduce -S -mtriple=x86_64-unknown-unknown | grep "phi double" | count 1
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define void @foobar(i32 %n) nounwind {
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entry:
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icmp eq i32 %n, 0 ; <i1>:0 [#uses=2]
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br i1 %0, label %return, label %bb.nph
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bb.nph: ; preds = %entry
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%umax = select i1 %0, i32 1, i32 %n ; <i32> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %bb.nph
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%i.03 = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3]
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tail call void @bar( i32 %i.03 ) nounwind
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uitofp i32 %i.03 to double ; <double>:1 [#uses=1]
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tail call void @foo( double %1 ) nounwind
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%indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %indvar.next, %umax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb, %entry
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ret void
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}
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; Unable to eliminate cast because the mantissa bits for double are not enough
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; to hold all of i64 IV bits.
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define void @foobar2(i64 %n) nounwind {
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entry:
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icmp eq i64 %n, 0 ; <i1>:0 [#uses=2]
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br i1 %0, label %return, label %bb.nph
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bb.nph: ; preds = %entry
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%umax = select i1 %0, i64 1, i64 %n ; <i64> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %bb.nph
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%i.03 = phi i64 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i64> [#uses=3]
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trunc i64 %i.03 to i32 ; <i32>:1 [#uses=1]
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tail call void @bar( i32 %1 ) nounwind
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uitofp i64 %i.03 to double ; <double>:2 [#uses=1]
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tail call void @foo( double %2 ) nounwind
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%indvar.next = add i64 %i.03, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %indvar.next, %umax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb, %entry
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ret void
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}
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; Unable to eliminate cast due to potentional overflow.
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define void @foobar3() nounwind {
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entry:
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tail call i32 (...)* @nn( ) nounwind ; <i32>:0 [#uses=1]
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icmp eq i32 %0, 0 ; <i1>:1 [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %bb, %entry
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%i.03 = phi i32 [ 0, %entry ], [ %3, %bb ] ; <i32> [#uses=3]
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tail call void @bar( i32 %i.03 ) nounwind
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uitofp i32 %i.03 to double ; <double>:2 [#uses=1]
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tail call void @foo( double %2 ) nounwind
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add i32 %i.03, 1 ; <i32>:3 [#uses=2]
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tail call i32 (...)* @nn( ) nounwind ; <i32>:4 [#uses=1]
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icmp ugt i32 %4, %3 ; <i1>:5 [#uses=1]
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br i1 %5, label %bb, label %return
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return: ; preds = %bb, %entry
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ret void
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}
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; Unable to eliminate cast due to overflow.
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define void @foobar4() nounwind {
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entry:
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br label %bb.nph
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb, %bb.nph
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%i.03 = phi i8 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3]
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%tmp2 = sext i8 %i.03 to i32 ; <i32>:0 [#uses=1]
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tail call void @bar( i32 %tmp2 ) nounwind
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%tmp3 = uitofp i8 %i.03 to double ; <double>:1 [#uses=1]
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tail call void @foo( double %tmp3 ) nounwind
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%indvar.next = add i8 %i.03, 1 ; <i32> [#uses=2]
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%tmp = sext i8 %indvar.next to i32
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%exitcond = icmp eq i32 %tmp, 32767 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb, %entry
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ret void
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}
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declare void @bar(i32)
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declare void @foo(double)
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declare i32 @nn(...)
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